Articles de revues : « Southernl Apennines »

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Matano, Fabio, Silvio Di Nocera, Sara Criniti et Salvatore Critelli. « Geology of the Epicentral Area of the November 23, 1980 Earthquake (Irpinia, Italy) : New Stratigraphical, Structural and Petrological Constrains ». Geosciences 10, n^o 6 (25 juin 2020) : 247. http://dx.doi.org/10.3390/geosciences10060247.

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The geology of the epicentral area of the 1980 earthquake (Irpinia-Lucania, Italy) is described with new stratigraphic, petrographic and structural data. Subsurface geological data have been collected during the studies for the excavation works of the Pavoncelli bis hydraulic tunnel, developing between Caposele and Conza della Campania in an area that was highly damaged during 1980 earthquake. Our approach includes geological, stratigraphic, structural studies, and petrological analyses of rock samples collected along the tunnel profile and in outcropping sections. Stratigraphic studies and detailed geological and structural mapping were carried out in about 200 km2 wide area. The main units cropping out have been studied and correlated in order to document the effects of tectonic changes during the orogenic evolution on the foreland basin systems and the sandstone detrital modes in this sector of the southern Apennines. The multi-disciplinary and updated datasets have allowed getting new insights on the tectono-stratigraphic evolution and stratigraphic architecture of the southern Apennines foreland basin system and on the structural and stratigraphic relations of Apennines tectonic units and timing of their kinematic evolution. They also allowed to better understand the relationships between internal and external basin units within the Apennine thrust belt and its tectonic evolution.

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Schiattarella, Marcello, Salvatore Ivo Giano et Dario Gioia. « Long-term geomorphological evolution of the axial zone of the Campania-Lucania Apennine, southern Italy : a review ». Geologica Carpathica 68, n^o 1 (1 février 2017) : 57–67. http://dx.doi.org/10.1515/geoca-2017-0005.

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Abstract Uplift and erosion rates have been calculated for a large sector of the Campania-Lucania Apennine and Calabrian arc, Italy, using both geomorphological observations (elevations, ages and arrangement of depositional and erosional land surfaces and other morphotectonic markers) and stratigraphical and structural data (sea-level related facies, base levels, fault kinematics, and fault offset estimations). The values of the Quaternary uplift rates of the southern Apennines vary from 0.2 mm/yr to about 1.2–1.3 mm/yr. The erosion rates from key-areas of the southern Apennines, obtained from both quantitative geomorphic analysis and missing volumes calculations, has been estimated at 0.2 mm/yr since the Middle Pleistocene. Since the Late Pleistocene erosion and uplift rates match well, the axial-zone landscape could have reached a flux steady state during that time, although it is more probable that the entire study area may be a transient landscape. Tectonic denudation phenomena — leading to the exhumation of the Mesozoic core of the chain — followed by an impressive regional planation started in the Late Pliocene have to be taken into account for a coherent explanation of the morphological evolution of southern Italy.

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Laviano, R., et G. Mongelli. « Geochemistry and mineralogy as indicators of parental affinity for Cenozoic bentonites : a case study from S. Croce di Magliano (southern Apennines, Italy) ». Clay Minerals 31, n^o 3 (septembre 1996) : 391–401. http://dx.doi.org/10.1180/claymin.1996.031.3.09.

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AbstractThe major and trace element contents and mineralogical composition of Cenozoic bentonites from the southern Apennines (Italy) have been determined, for the whole-rocks and the <2 µm size-fractions, in order to constrain parental affinities. The main mineralogical and chemical differences have been recognized in eleven samples allowing them to be grouped into two distinct subsets. The differences are based on smectite abundance, occurrence or lack of detrital clay phases, different contents of Ti, Fe, Mn, K, P, Rb, Sc, V, Cr and Ni and differences in the Eu/Eu* and Ti/Al elemental ratios. These ratios indicate an affinity for felsic volcanics for the subset showing high smectite contents. The low smectite subset shows, instead, an affinity for Cretaceous-Oligocene southern Apennine shales. A similar result is obtained using the La-Th-Sc and Th-Sc-Zr/10 diagrams. We suggest that during the deposition of the southern Apennine shales, episodic volcanic events took place. These were associated with the suture stage of the Tethyan ocean that promoted accumulation of felsic ash in the related basin and the diagenetic alteration of these materials produced bentonitic layers interbedded with shales.

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Trionfera, Brando, Alberto Frepoli, Gaetano De Luca, Pasquale De Gori et Carlo Doglioni. « The 2013–2018 Matese and Beneventano Seismic Sequences (Central–Southern Apennines) : New Constraints on the Hypocentral Depth Determination ». Geosciences 10, n^o 1 (30 décembre 2019) : 17. http://dx.doi.org/10.3390/geosciences10010017.

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The Matese and Beneventano areas coincide with the transition from the central to the southern Apennines and are characterized by both SW- and NE-dipping normal faulting seismogenic structures, responsible for the large historical earthquakes. We studied the Matese and Beneventano seismicity by means of high-precision locations of earthquakes spanning from 29 December 2013 to 4 September 2018. Events were located by using all of the available data from temporary and permanent stations in the area and a 1D computed velocity model, inverting the dataset with the Velest code. For events M > 2.8 we used P- and S-waves arrival times of the strong motion stations located in the study area. A constant value of 1.83 for Vp/Vs was computed with a modified Wadati method. The dataset consists of 2378 earthquakes, 18,715 P- and 12,295 S-wave arrival times. We computed 55 new fault plane solutions. The mechanisms show predominantly normal fault movements, with T-axis trends oriented NE–SW. Only relatively small E–W trending clusters in the eastern peripheral zones of the Apenninic belt show right-lateral strike-slip kinematics similar to that observed in the Potenza (1990–1991) and Molise (2002 and 2018) sequences. These belong to transfer zones associated with differential slab retreat of the Adriatic plate subduction beneath the Apennines. The Matese sequence (December 2013–February 2014; main shock Mw 5.0) is the most relevant part of our dataset. Hypocentral depths along the axis of the Apenninic belt are in agreement with previous seismological studies that place most of the earthquakes in the brittle upper crust. We confirm a general deepening of seismicity moving from west to the east along the Apennines. Seismicity depth is controlled by heat-flow, which is lower in the eastern side, thus causing a deeper brittle–ductile transition.

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Allocca, V., F. Manna et P. De Vita. « Estimating annual groundwater recharge coefficient for karst aquifers of the southern Apennines (Italy) ». Hydrology and Earth System Sciences 18, n^o 2 (27 février 2014) : 803–17. http://dx.doi.org/10.5194/hess-18-803-2014.

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Abstract. To assess the mean annual groundwater recharge of the karst aquifers in the southern Apennines (Italy), the estimation of the mean annual groundwater recharge coefficient (AGRC) was conducted by means of an integrated approach based on hydrogeological, hydrological, geomorphological, land use and soil cover analyses. Starting from the hydrological budget equation, the coefficient was conceived as the ratio between the net groundwater outflow and the precipitation minus actual evapotranspiration (P − ETR) for a karst aquifer. A large part of the southern Apennines, which is covered by a meteorological network containing 40 principal karst aquifers, was studied. Using precipitation and air temperature time series gathered through monitoring stations operating in the period 1926–2012, the mean annual P − ETR was estimated, and its distribution was modelled at a regional scale by considering the orographic barrier and rain shadow effects of the Apennine chain, as well as the altitudinal control. Four sample karst aquifers with available long spring discharge time series were identified for estimating the AGRC. The resulting values were correlated with other parameters that control groundwater recharge, such as the extension of outcropping karst rocks, morphological settings, land use and covering soil type. A multiple linear regression between the AGRC, lithology and the summit plateau and endorheic areas was found. This empirical model was used to assess the AGRC and mean annual groundwater recharge in other regional karst aquifers. The coefficient was calculated as ranging between 50 and 79%, thus being comparable with other similar estimations carried out for karst aquifers of European and Mediterranean countries. The mean annual groundwater recharge for karst aquifers of the southern Apennines was assessed by these characterizations and validated by a comparison with available groundwater outflow measurements. These results represent a deeper understanding of an aspect of groundwater hydrology in karst aquifers which is fundamental for the formulation of appropriate management models of groundwater resources at a regional scale, also taking into account mitigation strategies for climate change impacts. Finally, the proposed hydrological characterizations are also supposed to be useful for the assessment of mean annual runoff over carbonate mountains, which is another important topic concerning water management in the southern Apennines.

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Dichicco, Maria, Michele Paternoster, Giovanna Rizzo et Rosa Sinisi. « Mineralogical Asbestos Assessment in the Southern Apennines (Italy) : A Review ». Fibers 7, n^o 3 (19 mars 2019) : 24. http://dx.doi.org/10.3390/fib7030024.

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This paper deals with petrography and mineralogy of serpentinitic rocks occurring in the Southern Apennines (Italy) with the aim to review the already available literature data and furnish new details on asbestos minerals present in the studied area. Two sites of Southern Italy were taken into account: the Pollino Massif, at the Calabrian-Lucanian border, and the surroundings of the Gimigliano and Mt. Reventino areas where serpentinites of Frido Unit are mainly exposed. Textural and mineralogical features of the studied rocks point to a similar composition for both sites including asbestos minerals such as chrysotile and tremolite-actinolite series mineral phases. Only in the Pollino Massif serpentinites edenite crystals have been detected as well; they are documented here for the first time. This amphibole forms as fibrous and/or prismatic crystals in aggregates associated with serpentine, pyroxene, and calcite. Metamorphism and/or metasomatic alteration of serpentinites are the most probable processes promoting the edenite formation in the Southern Apennine ophiolitic rocks.

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Gori, Stefano, Emanuela Falcucci, Chiara Ladina, Simone Marzorati et Fabrizio Galadini. « Active faulting, 3-D geological architecture and Plio-Quaternary structural evolution of extensional basins in the central Apennine chain, Italy ». Solid Earth 8, n^o 2 (23 mars 2017) : 319–37. http://dx.doi.org/10.5194/se-8-319-2017.

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Abstract. The general basin and range Apennine topographic characteristic is generally attributed to the presently active normal fault systems, whose long-term activity (throughout the Quaternary) is supposed to have been responsible for the creation of morphological/structural highs and lows. By coupling field geological survey and geophysical investigations, we reconstructed the 3-D geological model of an inner tectonic basin of the central Apennines, the Subequana Valley, bounded to the northeast by the southern segment of one of the major active and seismogenic normal faults of the Apennines, known as the Middle Aterno Valley–Subequana Valley fault system. Our analyses revealed that, since the late Pliocene, the basin evolved in a double half-graben configuration through a polyphase tectonic development. An early phase, Late Pliocene–Early Pleistocene in age, was controlled by the ENE–WSW-striking and SSE-dipping Avezzano–Bussi fault, that determined the formation of an early depocentre towards the N–NW. Subsequently, the main fault became the NW–SE-striking faults, which drove the formation during the Quaternary of a new fault-related depocentre towards the NE. By considering the available geological information, a similar structural evolution has likely involved three close tectonic basins aligned along the Avezzano–Bussi fault, namely the Fucino Basin, the Subequana Valley, and the Sulmona Basin, and it has been probably experienced by other tectonic basins of the chain. The present work therefore points out the role of pre-existing transverse tectonic structures, inherited by previous tectonic phases, in accommodating the ongoing tectonic deformation and, consequently, in influencing the structural characteristics of the major active normal faults. This has implications in terms of earthquake fault rupture propagation and segmentation. Lastly, the morpho-tectonic setting of the Apennine chain results from the superposition of deformation events whose geological legacy must be considered in a wider evolutionary perspective. Our results testify that a large-scale basin and range geomorphological feature – often adopted for morpho-tectonic and kinematic evaluations in active extensional contexts, as in the Apennines – just led by range-bounding active normal faults may be actually simplistic, as it could not be applied everywhere, owing to peculiar complexities of the local tectonic histories.

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Amato, Vincenzo, Pietro P. C. Aucelli, Vito Bracone, Massimo Cesarano et Carmen Maria Rosskopf. « Long-term landscape evolution of the Molise sector of the central-southern Apennines, Italy ». Geologica Carpathica 68, n^o 1 (1 février 2017) : 29–42. http://dx.doi.org/10.1515/geoca-2017-0003.

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AbstractThis paper concerns the reconstruction of the main stages of the long-term landscape evolution of the Molise portion of the central-southern Apennines along a transect divided into three sectors (SW, Central and NE). Analysis mainly focused on geomorphological, stratigraphical and structural data supported by chronological constraints, coming from an overall review of past literature and several studies carried out by the authors of the paper during the last 20 years. The results obtained allowed the elaboration of a conceptual model of the long-term evolution of the Molise sector of the central-southern Apennines. Starting from the Pliocene, the emersion of the Molise area occurred gradually from SW to NE, allowing a polycyclic landscape to evolve under the major controls first of compression then transtensional to extensional tectonics as well as climatic variations. Principal markers of the Quaternary geomorphological evolution of the Molise area are represented by the infill successions of the intermontane tectonic depressions located in its internal, SW sector and by four orders of palaeosurfaces that developed between the Early Pleistocene and the beginning of the Late Pleistocene across the region. These markers testify to the alternation of phases of substantial tectonic stability and uplift whose spatial-temporal distribution could be assessed along the investigated transect. Results highlight that the most important stages of landscape evolution occurred during the Early and Middle Pleistocene. At the beginning of the Late Pleistocene, the Molise sector of the Apennine chain had already reached its present setting and further landscape evolution occurred under the major control of climate and land-use.

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D’errico, Marco, Angelida Di Staso, Annamaria Fornelli, Domenico Guida, Francesca Micheletti, Vincenzo Perrone et Giuliana Raffaelli. « The Numidian Flysch : a guide formation for the reconstruction of the paleogeography and tectono-sedimentary evolution of southern Apennines ». Bulletin de la Société Géologique de France 185, n^o 5 (1 mai 2014) : 343–56. http://dx.doi.org/10.2113/gssgfbull.185.5.343.

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Abstract The Numidian Flysch shows constant lithological features from the strait of Gibraltar to central Italy. It is characterized by quartzarenites showing grains of monocrystalline, rounded and frosted quartz, and by kaolinitic mudstones. This research has pointed out that in the southern Apennines 1) the Numidian Flysch was deposited exclusively in the Campania-Lucania carbonate platform and in the Lagonegro-Molise basin, both located on the Apulian continental margin, and never is present in tectonic units originated from the oceanic area located west of that margin; 2) in the axial zone of the Lagonegro basin it stratigraphically follows a formation consisting of varicoloured clays (Argille Varicolori Auct.); 3) its age is limited to the early-middle Langhian, that is to say, it begins to sediment about 7 million years later than in the Maghrebian chain and deposited for a time span limited to 1–1.5 Ma. The thickness of the Numidian Flysch gradually decreases towards the north from about 600–1,000 meters to a few tens of meters and in some of the northeastern outcrops it is represented only by some layers of quartzarenites. This is accompanied by a decrease in size of the particles becoming more and more finer. In addition, northwards and frequently in the same section, a lower mineralogical and textural maturity (from quartzarenites to litharenites, and presence of abundant matrix, sub-angular, polycrystalline and deformed quartz grains) is well recognizable. In the Campania-Lucania carbonate platform the Numidian Flysch evolves to pelagic marly-clayey deposits, followed by mineralogically immature turbidite sandstones of Serravallian age. In the Lagonegro basin the Numidian Flysch replaces Cretaceous-lower Miocene turbidite deposits, consisting of limestones and red marls, on the western side of the basin, variegated clays in the axial zone and calcareous turbidites or variegated clays in the eastern side. Since the late Langhian, it evolves to pelagic sediments followed by lower Tortonian immature turbidite sandstones. In the successions of the Molise basin the Numidian Flysch is interbedded in a succession consisting of calcareous turbidites and pelagic limestones and marls, reaching the Messinian. The lithological features and the age of the Numidian Flysch in central-southern Apennines, therefore, point out an evolution different from that of the Numidian Flysch of the Maghrebian chain. During the early Miocene, a paleogeographic barrier or other unknown obstacles prevent Numidian sands from reaching the south-Apenninic domains. In the early Langhian, the disappearance of these obstacles allows sands to reach the deep basins located on the Apulian margin. In the late Langhian the Numidian sedimentation is canceled and replaced by mainly pelagic sediments, which will evolve to foredeep deposits in the Serravallian-Messinian time span. In addition, the significant presence of feldspathic and lithic grains testifies a double detrital supply: polycyclic quartzose sands and kaolinitic mudstones from the African craton and metamorphic and plutonic grains from the Hercynian or older rocks of the internal units of the southern Apennines. The Numidian Flysch of the southern Apennines allows to assign the tectonic units in which is present to the Campania-Lucania carbonate platform or to different zones of the Lagonegro-Molise basin and therefore is of great importance in the reconstruction of both the Mesozoic-Cenozoic paleogeography and a tectono-sedimentary evolution very difficult to decipher, given the convergence of sedimentary facies in the Apenninic deep basins since Cretaceous to Miocene, the presence of several tectonic phases and of out of sequence and back-thrusts.

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Vitale, Stefano, Ernesto Paolo Prinzi, Maria Monda, Francesco D’Assisi Tramparulo et Sabatino Ciarcia. « Structural and Stratigraphic Setting of Campagna and Giffoni Tectonic Windows : New Insights on the Orogenic Evolution of the Southern Apennines (Italy) ». Geosciences 10, n^o 10 (10 octobre 2020) : 405. http://dx.doi.org/10.3390/geosciences10100405.

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We present a structural study on the tectonic windows of Giffoni and Campagna, located in the western sector of the southern Apennines (Italy). We analyzed thrusts, folds, and related minor deformation structures. Here, a major in-sequence E-verging thrust fault juxtaposes Meso-Cenozoic successions of the Apennine Platform (Picentini Mts unit) and the Lagonegro-Molise Basin (Frigento unit). However, out-of-sequence thrusts duplicated the tectonic pile with the interposition of the upper Miocene wedge-top basin deposits of the Castelvetere Group. We reconstructed the orogenic evolution of these two tectonic windows, including five deformation phases. The first (D1) was related to the in-sequence thrusting with minor thrusts and folds, widespread both in the footwall and the hanging wall. A subsequent extension (D2) has formed normal faults crosscutting the D1 thrusts and folds. All structures were subsequently affected by two shortening stages (D3 and D4), which also deformed the upper Miocene wedge top basin deposits of the Castelvetere Group. We interpreted the D3–D4 structures as related to an out-of-sequence thrust system defined by a main frontal E-verging thrust and lateral ramps characterized by N and S vergences. Low-angle normal faults were formed in the hanging wall of the major thrusts. Out-of-sequence thrusts are observed in the whole southern Apennines, recording a crustal shortening event that occurred in the late Messinian–early Pliocene. Finally, we suggest that the two tectonic windows are the result of the formation of an E–W trending regional antiform, associated with a late S-verging back-thrust, that has been eroded and crosscut by normal faults (D5) in the Early Pleistocene.

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Piana, Fabrizio, Luca Barale, Carlo Bertok, Anna d’Atri, Andrea Irace et Pietro Mosca. « The Alps-Apennines Interference Zone : A Perspective from the Maritime and Western Ligurian Alps ». Geosciences 11, n^o 5 (25 avril 2021) : 185. http://dx.doi.org/10.3390/geosciences11050185.

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In SW Piemonte the Western Alps arc ends off in a narrow, E-W trending zone, where some geological domains of the Alps converged. Based on a critical review of available data, integrated with new field data, it is concluded that the southern termination of Western Alps recorded the Oligocene-Miocene activity of a regional transfer zone (southwestern Alps Transfer, SWAT) already postulated in the literature, which should have allowed, since early Oligocene, the westward indentation of Adria, while the regional shortening of SW Alps and tectonic transport toward the SSW (Dauphinois foreland) was continuing. This transfer zone corresponds to a system of deformation units and km-scale shear zones (Gardetta-Viozene Zone, GVZ). The GVZ/SWAT developed externally to the Penninic Front (PF), here corresponding to the Internal Briançonnais Front (IBF), which separates the Internal Briançonnais domain, affected by major tectono-metamorphic transformations, from the External Briançonnais, subjected only to anchizonal metamorphic conditions. The postcollisional evolution of the SW Alps axial belt units was recorded by the Oligocene to Miocene inner syn-orogenic basin (Tertiary Piemonte Basin, TPB), which rests also on the Ligurian units stacked within the adjoining Apennines belt in southern Piemonte. The TPB successions were controlled by transpressive faults propagating (to E and NE) from the previously formed Alpine belt, as well as by the Apennine thrusts that were progressively stacking the Ligurian units, resting on the subducting Adriatic continental margin, with the TPB units themselves. This allows correlation between Alps and Apennines kinematics, in terms of age of the main geologic events, interference between the main structural systems and tectonic control exerted by both tectonic belts on the same syn-orogenic basin.

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ARRAGONI, S., L. P. FERNÁNDEZ, A. CUESTA, M. MAGGI, P. CIANFARRA et F. SALVINI. « Origin of exotic clasts in the Central-Southern Apennines : clues to the Cenozoic fold-and-thrust collisional belt in the Central Mediterranean area ». Geological Magazine 155, n^o 2 (30 octobre 2017) : 479–505. http://dx.doi.org/10.1017/s0016756817000930.

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AbstractThe Central-Southern Apennines are the result of the collision between Europe and Africa. Despite the volume of existing literature, many problems remain unsolved such as the presence of Tertiary conglomerates containing exotic basement clasts. The lack of basement rocks in the Central-Southern Apennines implies that the origin of these clasts has to be sought in areas where the basement is extensively exposed. These include the Calabro–Peloritani arc and the Sardinia–Corsica block, which in Cenozoic time were connected to the Central-Southern Apennines. In this work we present the results of sedimentary, geochemical and petrographic analyses performed on the exotic basement-derived clasts. These analyses include lithological, major- and minor-element and rare Earth element compositions which are compared to analogous rocks from Calabria and Sardinia basements. Results indicate Eastern Sardinia as the primary source area for the studied conglomeratic units, linking the Central-Southern Apennines sedimentary cover to the Mesozoic carbonates of Eastern Sardinia prior to the opening of Tyrrhenian Sea. The Cilento unit (Campania) was directly fed by an uplifting Cenozoic orogen, and the Filettino, Gavignano (Latium) and Ariano Irpino (Campania) units were produced by the successive reworking of ‘Cilento-like’ sedimentary units. These results may imply that part of the Central-Southern Apennines represented a portion of the European margin of the Tethys.

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VENTURI, FEDERICO, MASSIMILIANO BILOTTA et CARLO RICCI. « Comparison between western Tethys and eastern Pacific ammonites : further evidence for a possible late Sinemurian–early Pliensbachian trans-Pangaean marine connection ». Geological Magazine 143, n^o 5 (septembre 2006) : 699–711. http://dx.doi.org/10.1017/s0016756806002068.

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Comparing the Early Jurassic ammonoids found in three Italian Apennine sections (Bosso, Pallareto and Furlo) with those reported in the literature for some South American sections (Argentina and Chile), we noted that these two areas share the same late Sinemurian–early Pliensbachian faunal succession: Paltechioceras in the late Sinemurian (Raricostatum Zone), Catriceras in the earliest Pliensbachian (Jamesoni Zone, Taylori Subzone), Miltoceras in the middle part of the early Pliensbachian (Jamesoni Zone, Polymorphus Subzone). An overall similarity to Apennine and South American ammonite faunas of the same age can be found for some sections of Morocco and partially also for southern Spain. One of the Italian taxa (an unpublished early Pliensbachian Apennine genus, ascribable to the family Polymorphitidae) is reported in the South American Pacific coast by the middle to late part of the early Pliensbachian (Ibex Zone). Evolving towards more and more discoidal morphologies, it might have given rise to an endemic American ammonite group, which is represented by the genera Eoamaltheus Hillebrandt and Fanninoceras McLearn. This phylogenetic reconstruction is based on several lines of evidence (shell morphology, ontogenetic development, aspect of the suture lines, biostratigraphy), and can be safely traced back to the basal Pliensbachian strata of the Tethyan Palaeoprovince. As far as we know, the examined ammonoid taxa are exclusively found in the western Tethys (e.g. Italian Apennines) and American Pacific coast (e.g. Argentina), but they have never been recorded elsewhere, and they show no evidence of pantropical distribution. Our biostratigraphic and phylogenetic data suggest the existence of a late Sinemurian–early Pliensbachian marine connection between the western Tethys (Italian Apennines) and the South American Pacific coast (Argentina). This is the so-called Hispanic Corridor, the existence of which has already been supported by many authors using several geological and palaeontological pieces of evidence. According to our interpretation, as well as the conclusions of other workers, it was a temporary and intermittent seaway, which allowed a partial faunal exchange for some taxa (including certain shallow-water ammonoids) during Sinemurian and Pliensbachian times. This palaeobiogeographic model consistently relates the biostratigraphy and evolution of some western Tethys and South American ammonoids to the major palaeogeographic changes affecting this vast area. In any case, our working hypothesis does not have any claim of universal applicability; we deem the proto-Atlantic seaway model to be the most suitable (until proof of the contrary) for the ammonites we examined, but it may not be necessarily valid for all the currently known taxa.

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Festa, Vincenzo, Marianna Cicala et Fabrizio Tursi. « The Curinga–Girifalco Line in the framework of the tectonic evolution of the remnant Alpine chain in Calabria (southern Italy) ». International Journal of Earth Sciences 109, n^o 7 (12 septembre 2020) : 2583–98. http://dx.doi.org/10.1007/s00531-020-01918-5.

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Abstract In the peri-Mediterranean metamorphic belts, the tectonic evolution of the Calabria–Peloritani terrane during the dominant compressive tectonics of the Eocene represents one of the most problematic points in palinspastic restorations. A matter of particular debate is its shortening, which could have occurred during the Alpine or the Apennine subduction. In this regard, a crucial joint is provided by the kinematics of one of the most relevant shear zones such as the Curinga–Girifalco Line, cropping out in central Calabria. This shear zone juxtaposed a nearly complete Hercynian crustal section (i.e. the Sila and Serre Unit) onto the remnants of the Castagna Unit. The data in the available literature on ductile kinematics from the south-eastern branch of the Curinga–Girifalco Line indicate a downward movement of the hanging wall. In the present paper we show new, ductile kinematic data and petrographic evidence from outcrops in the north-western and south-eastern branches of the Curinga–Girifalco Line. Our results highlight the coherent kinematics of the Eocene shortening during the Alpine subduction system, followed by (late Eocene?)Oligocene to early Miocene, dominantly ductile extensional reworking, relating to the Apennines subduction system.

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Galadini, Fabrizio, Carlo Meletti et Eutizio Vittori. « Major active faults in Italy : available surficial data ». Netherlands Journal of Geosciences 80, n^o 3-4 (décembre 2001) : 273–96. http://dx.doi.org/10.1017/s001677460002388x.

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AbstractAn inventory of the available surficial data on active faults in Italy has been compiled by gathering all the available information on peninsular Italy (project by CNR, National Group for the Defense against Earthquakes), the central-eastern Alps and the Po Plain (EC ‘PALEOSIS’ project). Such information has been summarised in maps (reporting surficial expressions of faults with length L≥11 km) and in a table where fault parameters relevant for seismic hazard assessment (e.g. slip rates, recurrence intervals for surface faulting events, etc..) have been reported. Based on the geological characteristics of the Italian territory, a fault has been considered as active if it shows evidence of Late Pleistocene-Holocene displacements. Active faults in Italy are distributed throughout the entire Apennine chain, in the Sicilian and Calabrian regions and in some Alpine sectors, but knowledge is not homogeneously distributed through the territory. The largest amount of data is related to the central Apennines. In contrast, fault geometries and parameters are less well defined in the southern Apennines, Sicily and Calabria, where investigations have started more recently. Knowledge is sparse in the northern Apeninnes, where data necessary to define fault parameters are lacking and also the chronology of the activity has to be considered cautiously. Abundant blind faulting in the Po Plain hinders the detection of active faults by means of the classical surficial investigations and therefore the present knowledge is limited to the Mantova fault. Blind faults and the peculiar recent geological history of the Alpine areas, which is strongly conditioned by the erosional and depositional activity during and after the last glacial maximum, also hinder the identification of active faults in the central-eastern Alps. Some faults in this Alpine sector are believed to be active, but data on their segmentation are still missing. Available information indicates that Italian active faults are usually characterised by slip rates lower than 1 mm/yr. Recurrence intervals for surface faulting events are longer than 1,000 years in the central and southern Apennines. This review on the Italian active faults represents the first step to produce a map of the major seismic sources in Italy, which in turn will result from the merge of surficial data with seismological and geological subsurficial data. The available knowledge gathered in this paper indicates those areas where data are presently sparse. It should be, therefore, possible to better plan future geomorphological and paleoseismological investigations.

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Rositi, Angela Anna, Giovanna Jona Lasinio et Paolo Ciucci. « Assessing Forest Structural and Topographic Effects on Habitat Productivity for the Endangered Apennine Brown Bear ». Forests 12, n^o 7 (14 juillet 2021) : 916. http://dx.doi.org/10.3390/f12070916.

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Any forest management potentially affects the availability and quality of resources for forest-dwelling wildlife populations, including endangered species. One such species is the Apennine brown bear, a small and unique population living in the central Apennines of Italy. The conservation of this relict bear population is hampered by the lack of knowledge of the fine-scale relationships between productivity of key foods and forest structure, as this prevents the design and implementation of effective forest management plans. To address this issue, we sampled the main structural stand attributes within the bear’s range and used multivariate generalized linear mixed models in a Bayesian framework to relate forest structural attributes to proxies of productivity of key bear foods. We found that hard mast was positively associated with both forest typology and high forest system, but negatively related to both the time elapsed since the last forest utilization and the amount of deadwood. The availability of soft-mast producing species was positively related to past forestry practices but negatively associated with steep slopes historically managed with high tree densities and a low silvicultural disturbance. Our findings also suggest that herb cover was negatively affected by terrain steepness and basal area, while herb productivity was positively affected by northern and southern exposure. Additionally, richness of forest ants was associated with forests characterized by low volume and high density. Our findings confirm that the productivity of natural bear foods is strongly affected by forest structural and topographical characteristics and are relevant as preliminary information for forest management practices to support the long-term conservation of Apennine bears.

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ENRICA DANUBIO, MARIA, et ELISA AMICONE. « BIODEMOGRAPHIC STUDY OF A CENTRAL APENNINE AREA (ITALY) IN THE 19TH AND 20TH CENTURIES : MARRIAGE SEASONALITY AND REPRODUCTIVE ISOLATION ». Journal of Biosocial Science 33, n^o 3 (juillet 2001) : 427–49. http://dx.doi.org/10.1017/s0021932001004278.

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This study investigates seasonality of marriages and reproductive isolation in six long-isolated communities in the central Apennines (Italy). It had two objectives: (1) the identification of an Apennine biodemographic model in comparison with mountain communities of other regions, and with non-Apennine communities in Abruzzo, and (2) to identify the possible effects of the drainage of Lake Fucino (1854–1876) on that area. Marriages in this region show two very stable seasonal patterns: one is typical of sedentary rural societies, with summer migrations and marriages preferentially celebrated in the winter, and the other has marriages that are strongly concentrated in the summer months, i.e. between 75% and 93·5% of marriages were celebrated between June and October in these communities in the 1800s. These were traditionally pastoral communities with winter transhumance of the flocks and their shepherds towards the lowlands of southern Italy. In both groups, restrictions imposed by the Catholic Church do not seem to have affected the timing of marriages. Indeed, economic factors related to work activities seem to have had more influence. Concerning reproductive isolation, the results show high rates of endogamy: between 85% and 98% in both the 19th and 20th centuries. Rates of consanguineous marriages were between 5% and 20%, and those of isonymous marriages rarely exceeded 9%. The coefficient of inbreeding α shows that there was a delayed, limited period of increased consanguinity in the few decades around the turn of the century. This is different from the national situation, and thus could be a consequence of the Lake Fucino drainage.

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Filocamo, Francesca, Carmen Maria Rosskopf, Vincenzo Amato et Massimo Cesarano. « A Step towards a Sustainable Tourism in Apennine Mountain Areas : A Proposal of Geoitinerary across the Matese Mountains (Central-Southern Italy) ». Geosciences 12, n^o 2 (21 février 2022) : 100. http://dx.doi.org/10.3390/geosciences12020100.

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The Apennine mountain areas suffer progressive abandonment and marginality, although being characterized by an extraordinary richness in natural and cultural resources, and landscapes of great beauty. Therefore, their natural heritage, and especially their geoheritage, tranformed into geotourism initiatives, can represent an essential resource to support local economy andsustainable development. The present study illustrates the case of Matese Mountains (Southern Apennines), particularly rich in protected areas, including the Matese National Park currently taking off, which is characterized by a rich geoheritage, based on 59 geosites. Among these geosites, examining the specially built geosite GIS database, 16 geosites were selected to construct a geoitinerary crossing the Matese Mountains. The geoitinerary was delineated to optimally represent the major geomorphological and geological (especially geohistorical) features of the Matese area. The selected geosites were associated to a new procedure to assess their Scientific Value (SV) and Potential Tourism Use (PTU), and to confirm their suitability for the purpose. To illustrate the geoitinerary, a geoitinerary map, and illustration material such as descriptive cards were produced. As an overall result, the proposed geoitinerary represents a valuable contribution for the geotourism promotion of the Matese Mountains on which to base future studies and initiatives in this perspective.

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S, Critelli. « Petrophysical Signatures and Water-Reservoir Potential of Southern Apennines Turbiditic Sandstones Suites ». Petroleum & ; Petrochemical Engineering Journal 4, n^o 2 (2020) : 1–22. http://dx.doi.org/10.23880/ppej-16000228.

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After the seismic event of Irpinia (Southern Apennines), occurred on November 23rd 1980, the Pavoncelli tunnel, that used to supply with water the Puglia Region, was seriously damaged. Because of the strategic importance of this civil engineering work, a new water tunnel named Pavoncelli-bis that should substitute the previous one, was built and finally tested during the end of the 2019. The geological features of the area, highlighted the presence of three main siliciclastic formations (Corleto, pre-Numidian/Numidian and Castelvetere formations), crossed by the tunnel trace, that were petrophysically analyzed through the mercury injection porosimetry for a better definition of their petrophysical signatures and related water-reservoir potential at regional scale as hydrocarbon-reservoir potential. Data highlighted the presence of two clusters: one represented by the Corleto and Pre-Numidian Fms. showing good permeability (respectively 181.70 mD and 122.25 mD in median) and low porosity (respectively 4.56 % and 3.94 % in median); the other, represented by the Castelvetere Fm. highlighting good porosity (9.58 % in median) and a very low permeability (4.84 mD in median). Permeability, more than porosity, affects the cluster differentiation, whereas the other variables (average pore diameter and nanopores volume) do not show any particular trend. All these petrophysical parameters were compared with the sandstone composition (Qm, F, Lt), highlighting that porosity results negatively correlated to monocrystalline quartz (Qm) and positively correlated with feldspars (F). The lithic fragments values (Lt) are sparse and do not show any specific trend. The variability of porosity is directly linked with the diagenetic processes that interested the clusters of the Corleto and pre-Numidian Fms. (rich of Qm) and the Castelvetere Fm. (rich of F). Particularly, where quartz is more abundant, quartz cementation and overgrowth are more efficient and widespread, resulting in a reduction of the porosity. On the contrary, where feldspars are abundant, during diagenesis their dissolution can create new pore spaces and also clay-minerals with a better porosity than the previous feldspars. Moreover, clay-minerals can coat the quartz grains present in the sandstones inhibit the porosity loss of the quartz cementation and overgrowth. However, despite an increase in porosity, permeability decreases because the authigenic clays is mainly formed by isolated and blind pores.

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RAPUZZI, PIERPAOLO, et FRANCESCO PARISI. « NOTES ON AGAPANTHIA (SYNTHAPSIA) KIRBYI (GYLLENHAL, 1817) WITH DESCRIPTION OF A NEW SUBSPECIES AND THE CONFIRMATION OF ITS OCCURRENCE IN ITALY (COLEOPTERA CERAMBYCIDAE LAMIINAE) ». Redia 105 (16 juin 2022) : 83–89. http://dx.doi.org/10.19263/redia-105.22.11.

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Rapuzzi P., Parisi F. - Notes on Agapanthia (Synthapsia) kirbyi (Gyllenhal, 1817) with description of a new subspecies and the confirmation of its occurrence in Italy (Coleoptera Cerambycidae Lamiinae). In this paper, we investigated hundreds of specimens within the Agapanthia kirbyi (Gyllenhal, 1817) with the aim of finding relevant discrepancies in the Western and Southeastern populations. Amongst the species, the most diverse characters are body shape and pubescence color; however, based on the different geographical distribution it is possible to classify it into three different subspecies. One of these subspecies is new and is described below as Agapanthia (Synthapsia) kirbyi samai new subspecies. We also consider the characters used to create the Genus Synthapsia by Pesarini & Sabbadini (2004) not sufficient for a genus rank but at least for a subgenus rank (new status) due to the fact that other species close to A. kirbyi (Agapanthia hirsuticornis) shows intermediate characters between Synthapsia and Agapanthia. We also formalize the following new synonym: A. kirbyi ssp. zawadskyi Fairmaire, 1866 (name resurrected, new combination) = A. kirbyi ssp. valandoensis Sláma 2015 (new synonym) on the base of many specimens studied from the type localities of both the Taxon. In addition, the occurrence of A. kirbyi (Gyllenhal, 1817) is ascertained in Italy; in fact, eleven specimens were reported in the Matese Mountains, central-southern Apennines, between the years 2019 and 2021. This extends its known distribution into southern Europe and further confirms the important biogeographical role of this mountainous territory. Key Words: Longhorn beetles, Geographical range, Holotype, Matese mountain, central-southern Apennine.

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Endignoux, L., I. Moretti et F. Roure. « Forward modeling of the Southern Apennines ». Tectonics 8, n^o 5 (octobre 1989) : 1095–104. http://dx.doi.org/10.1029/tc008i005p01095.

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Catalano, Stefano, Giuseppe Grasso, Paolo Mazzoleni, Carmelo Monaco et Luigi Tortorici. « Intracontinental tectonic melange in Southern Apennines ». Terra Nova 19, n^o 4 (août 2007) : 287–93. http://dx.doi.org/10.1111/j.1365-3121.2007.00749.x.

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Iannace, Pietro, Maurizio M. Torrente et Alfonsa Milia. « Tectono-stratigraphic evolution of the Southern Campania Margin : a key area for the evolution of the Tyrrhenian-Apennine system ». Oil & ; Gas Science and Technology – Revue d’IFP Energies nouvelles 73 (2018) : 39. http://dx.doi.org/10.2516/ogst/2018035.

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The Southern Campania Margin (SCM) represents a key area of the Central Mediterranean because it records all the rifting stages of the Tyrrhenian Sea. The interpretation of a seismic dataset calibrated with deep wells and outcrops, using seismic stratigraphy and structural geology methods in a dedicated Geographic Information System (GIS) environment, the seismic depth conversion, the generation of 2-D and 3-D models led to the reconstruction of a polyphased tectono-stratigraphic evolution of the SCM. During the early stage of Tyrrhenian opening a terrigenous transtensional Basin (Langhian-Tortonian Cilento Basin) formed on the Liguride accretionary prism adjacent to the Calabria crystalline terrane. In the SCM the Liguride thrust sheets tectonically overly the Apennine Platform units and both these nappes have been dismembered by Quaternary faults. Three rifting stages, not homogeneously distributed, affected the region since the Lower Pleistocene. They are associated to the deposition of a thick Quaternary succession (A, B and C units). During these Pleistocene stages there was an abrupt change of the extension direction (from NE-SW to NW-SE) accompanying a change of the nappe transport direction of the Southern Apennines. The construction of balanced sections using dedicated software, permitted us to recognize the true geometry of the faults and compute the amount of Quaternary extension of the SCM that results comparable to those calculated for other sectors of the Tyrrhenian margin and further extensional regions worldwide.

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Valensise, Gianluca, Daniela Pantosti et Roberto Basili. « Seismology and Tectonic Setting of the 2002 Molise, Italy, Earthquake ». Earthquake Spectra 20, n^o 1_suppl (juillet 2004) : 23–37. http://dx.doi.org/10.1193/1.1756136.

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Two Mw 5.7 earthquakes struck a sparsely populated region of southern Italy, on October 31 and November 1, triggering a swarm-like sequence that lasted for several days. The earthquakes were caused by pure right-lateral slip between 10 and 24 km depth over a nearly vertical, previously undetected east-west fault. This mechanism is not typical for southern Italy, where normal faulting in the uppermost 12 km of the crust seems to dominate. However, east-west strike-slip faulting is kinematically consistent with the widely documented Apennines extension. The earthquake-causative fault appears to connect the Mattinata fault, a major active strike-slip feature cutting across the Gargano promontory, with east-west structures known beneath the axial part of the Apennines. The 2002 earthquakes thus highlighted a mode of earthquake release that may explain several large yet poorly understood historical earthquakes (e.g., 1361, 1456, 1731, 1930) located between the crest of the Apennines and the Adriatic coastline.

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Fornelli, Annamaria, Salvatore Gallicchio, Francesca Micheletti et Antonio Langone. « Preliminary U-Pb Detrital Zircon Ages from Tufiti di Tusa Formation (Lucanian Apennines, Southern Italy) : Evidence of Rupelian Volcaniclastic Supply ». Minerals 10, n^o 9 (6 septembre 2020) : 786. http://dx.doi.org/10.3390/min10090786.

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U-Pb spot ages have been determined on detrital zircons from two samples of volcaniclastic arenites belonging to the Tufiti di Tusa Formation (TTF) outcropping in the Lucanian Apennines (Southern Italy). Many petrographic and geochemical studies have been performed on these sandstones with the aim of defining their detritus source. A new and precise evaluation of the mineralogical composition of metamorphic lithic fragments, together with U-Pb detrital zircon ages, helps to clarify the deposition age of these syn-sedimentary volcaniclastic sandstones and constrains their source areas. Volcaniclastic arenites consist of andesitic fragments and single minerals of plagioclases, clinopyroxenes, and hornblendes, while the metamorphic lithics are mainly fragments of blue amphibole-bearing micaschists, serpentinites, ophicalcites, phyllites, and medium-grade micaschists. Phaneritic plutonic fragments consist of quartz, feldspar, and micas. Carbonate components include biomicritic and biosparitic fragments. Eighty age data collected from 56 zircons reveal a wide age spectrum, ranging from Neoarchean to Rupelian (from 2712 ± 25 to 30 ± 1 Millions of years (Ma)). The age data show that in volcaniclastic sandstones there is evidence of ancient crystalline basements involved in Cadomian and Variscan orogenesis (ages from 2712 ± 25 Ma to ≈260 Ma), whereas the measured ages of 157 Ma testify the events of Pangea fragmentation and the ages between 78 and 67 Ma are related to subduction metamorphism connected to the Alpine orogenesis. Fifty percent of the estimated detrital zircon ages show a mean concordant age of 33 ± 1 Ma, they have been measured on idiomorphic crystals with undisturbed magmatic oscillatory zoning. These data reveal the true sedimentation age of Tufiti di Tusa sandstones at least at the sampled levels, coeval with that recorded in other Rupelian volcaniclastic successions outcropping in the Northern Apennines and in the Western Alps (e.g., Val d’Aveto-Petrignacola Formation, Ranzano Formation and Taveyannaz Sandstone). These data represent preliminary suggestions of the sedimentation age of the Tufiti di Tusa Formation and Rupelian paleogeography in the Western Mediterranean area. During Priabonian-Rupelian times, the volcanic calc-alkaline detritus linked to a widespread syn-sedimentary igneous activity on the hinterland terranes of the foredeep basins in the Apennine-Maghrebian orogen extended from north to south in the Western-Central Mediterranean area.

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Massaro, L., A. Corradetti, F. Vinci, S. Tavani, A. Iannace, M. Parente et S. Mazzoli. « Multiscale Fracture Analysis in a Reservoir-Scale Carbonate Platform Exposure (Sorrento Peninsula, Italy) : Implications for Fluid Flow ». Geofluids 2018 (2018) : 1–10. http://dx.doi.org/10.1155/2018/7526425.

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We derive the discrete fracture network (DFN) of a Lower Cretaceous carbonate platform succession exposed at Mt. Faito (Southern Apennines), which represents a good outcrop analogue of the coeval productive units of the buried Apulian Platform in the Basilicata oilfields. A stochastic distribution of joints has been derived by sampling at two different scales of observation. At the outcrop scale, we measured fracture attributes by means of scan lines. At a larger scale, we extracted fracture attributes from a 3D model. This multiscale survey showed the occurrence of an arresting bed for through-going fractures, which is characterized by a low relative permeability, determining a vertical compartmentalization. The DFN model, obtained by integrating fieldwork and numerical modelling by means of the 3D-Move® software, shows a well-defined relationship of permeability and fracture porosity with the relative connectivity of the fracture network. The latter is influenced by the length and aperture and to a lesser extent by the fracture intensity. The permeability distribution obtained for our outcrop analogue can be used to inform modelling of the Basilicata oilfield reservoirs, although the different burial history between the exposed Apennine Platform and the buried Apulian Platform must be taken into account.

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Gaudiosi, Germana, Giuliana Alessio, Rosa Nappi, Valentina Noviello, Efisio Spiga et Sabina Porfido. « Evaluation of Damages to the Architectural Heritage of Naples as a Result of the Strongest Earthquakes of the Southern Apennines ». Applied Sciences 10, n^o 19 (1 octobre 2020) : 6880. http://dx.doi.org/10.3390/app10196880.

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The city of Naples (Campanian region, Southern Italy) has been hit by the strongest earthquakes located inside the seismogenic areas of the Southern Apennines, as well as by the volcano-tectonic earthquakes of the surrounding areas of the Campi Flegrei, Ischia and Vesuvius volcanic districts. An analysis of the available seismic catalogues shows that in the last millennium, more than 100 earthquakes have struck Naples with intensities rating I to III on the Mercalli–Cancani–Sieberg (MCS) scale over the felt level. Ten of these events have exceeded the damage level, with a few of these possessing an intensity greater than VII MCS. The catastrophic earthquakes of 1456 (I0 = XI MCS), 1688 (I0 = XI MCS) and 1805 (I0 = X MCS) occurred in the Campania–Molise Apennines chain, produced devastating effects on the urban heritage of the city of Naples, reaching levels of damage equal to VIII MCS. In the 20th century, the city of Naples was hit by three strong earthquakes in 1930 (I0 = X MCS), 1962 (I0 = IX MCS) and 1980 (I0 = X MCS), all with epicenters in the Campania and Basilicata regions. The last one is still deeply engraved in the collective memory, having led to the deaths of nearly 3000 individuals and resulted in the near-total destruction of some Apennine villages. Moreover, the city of Naples has also been hit by ancient historical earthquakes that originated in the Campanian volcanic districts of Campi Flegrei, Vesuvio and Ischia, with intensities up to VII–VIII MCS (highest in the Vesuvian area). Based on the intensity and frequency of its past earthquakes, the city of Naples is currently classified in the second seismic category, meaning that it is characterized by “seismicity of medium energy”. In this paper, we determine the level of damage suffered by Naples and its monuments as a result of the strongest earthquakes that have hit the city throughout history, highlighting its repetitiveness in some areas. To this aim, we reconstructed the seismic history of some of the most representative urban monuments, using documentary and historical sources data related to the effects of strong earthquakes of the Southern Apennines on the city of Naples. The ultimate purpose of this study is to perform a seismic macro-zoning of the ancient center of city and reduce seismic risk. Our contribution represents an original elaboration on the existing literature by creating a damage-density map of the strongest earthquakes and highlighting, for the first time, the areas of the city of Naples that are most vulnerable to strong earthquakes in the future. These data could be of fundamental importance to the construction of detailed maps of seismic microzones. Our study contributes to the mitigation of seismic risk in the city of Naples, and provides useful advice that can be used to protect the historical heritage of Naples, whose historical center is a UNESCO World Heritage site.

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Aucelli, Pietro, Vincenzo Amato, Massimo Cesarano, Gerardo Pappone, Carmen Rosskopf, Elda Ermolli et Fabio Scarciglia. « New morphostratigraphic and chronological constraints for the Quaternary paleosurfaces of the Molise Apennine (southern Italy) ». Geologica Carpathica 62, n^o 1 (1 février 2011) : 17–26. http://dx.doi.org/10.2478/v10096-011-0002-2.

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New morphostratigraphic and chronological constraints for the Quaternary paleosurfaces of the Molise Apennine (southern Italy)The Molise Apennines feature numerous relicts of paleosurfaces, mostly of erosional origin, which represent the remnants of gently-rolling ancient landscapes now hanging at different altitudes above the local base-levels of erosion. Their genesis can be related to prolonged periods of relative tectonic stability alternating with periods of uplift, or to the interplay between steady tectonic uplift and climatic fluctuations. Four orders of paleosurfaces were recognized: I (> 1,100 m a.s.l.), II (900-1,000 m a.s.l.), III (750-850 m a.s.l.), IV (600-720 m a.s.l.). The most ancient orders (I and II) are cut into the bedrock and are located at the top of the Matese and Montagnola di Frosolone massifs. The youngest paleosurfaces (III—IV), partially cut into Quaternary deposits, are found along the valley flanks of the main river systems and within the Boiano, Carpino, Isernia and Sessano intramontane basins. The present study deals with the dating of the Sessano Basin Paleosurface (SBP) which is related to the IV order and is cut into the basin infill. The40Ar/39Ar age of a tephra layer (437 ± 1.9 ka), intercalated at the top of the succession, supported by archaeo-stratigraphic, palynological and paleopedological data, allowed the SBP surface to be constrained to 350-300 ka. The SBP chronological position represents an important morphostratigraphic marker: it is the firstante quemandpost quemdate that allows the chronological position of the other orders of paleosurfaces to be better constrained.

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DI PIETRO, ROMEO, PAOLA FORTINI, DIMTAR LAKUŠIĆ et DUILIO IAMONICO. « Typification of the name Edraianthus siculus (Campanulaceae), endemic species from S-Italy ». Phytotaxa 451, n^o 4 (7 juillet 2020) : 297–300. http://dx.doi.org/10.11646/phytotaxa.451.4.5.

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Edraianthus (Candolle 1830: 130) Candolle (1839: 149) (Campanulaceae Juss.) is a genus of 10–14 species with a centre of distribution in the Balkans, while disjunctions occur in the central and southern Apennines (peninsular Italy), Sicily, and the southern Carpathians (Stefanović et al. 2008).

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Zolezzi, F., P. Morasca, K. Mayeda, W. S. Phillips et C. Eva. « Attenuation tomography of the Southern Apennines (Italy) ». Journal of Seismology 12, n^o 3 (27 février 2008) : 355–65. http://dx.doi.org/10.1007/s10950-007-9079-6.

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Sillitoe, Richard H., et Andrea Brogi. « GEOTHERMAL SYSTEMS IN THE NORTHERN APENNINES, ITALY : MODERN ANALOGUES OF CARLIN-STYLE GOLD DEPOSITS ». Economic Geology 116, n^o 7 (1 novembre 2021) : 1491–501. http://dx.doi.org/10.5382/econgeo.4883.

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Abstract Carlin-type gold deposits in northern Nevada are inferred to overlie concealed late Eocene plutons, which are increasingly thought to have provided magmatic input to the meteoric water-dominated fluids from which the gold was precipitated. The Larderello, Monte Amiata, and Latera geothermal systems in the Northern Apennines of southern Tuscany and northern Latium, central Italy, may represent Pliocene to present-day analogues because of their demonstrated association with subsurface plutons and jasperoid-hosted antimony-gold mineralization. The plutons, which at depths of >5–7 km remain at least partially molten, continue to supply heat and magmatic fluids to the meteoric water-dominated geothermal systems. Formerly mined antimony deposits of Pliocene or younger age are exposed on the peripheries of the CO2 ± H2S-emitting geothermal systems, and antimony sulfides are still actively precipitating. Stibnite and submicroscopic gold in disseminated pyrite, along with Au/Ag of <0.5 and anomalous As, Hg, Tl, and Ba values, accompanied jasperoid formation in the Northern Apennines systems. Carlin-type mineralization in northern Nevada and the antimony-gold mineralization in the Northern Apennines are hosted by permeable carbonate rocks, particularly stratabound breccias, where they are intersected by steep normal or oblique-slip faults and confined beneath tectonically emplaced hydrologic seals. The Northern Apennines antimony-gold mineralization formed at shallow, epithermal depths, like that recently recognized in the southern Carlin trend of northern Nevada. Although underexplored, the Northern Apennines gold prospects are unlikely to ever attain the giant status of the Carlin-type deposits in northern Nevada, probably because of lower magmatic fertility (ilmenite-series rather than magnetite-series magmatism) and host-rock receptivity (less reactive iron). Nevertheless, shallow carbonate-rock aquifers within high-temperature, intrusion-related geothermal systems, be they extinct or still active, may be prospective for Carlin-style gold deposits.

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Allocca, V., F. Manna et P. De Vita. « Estimating annual effective infiltration coefficient and groundwater recharge for karst aquifers of the southern Apennines ». Hydrology and Earth System Sciences Discussions 10, n^o 8 (7 août 2013) : 10127–59. http://dx.doi.org/10.5194/hessd-10-10127-2013.

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Abstract. To assess the mean annual groundwater recharge of the karst aquifers in southern Apennines (Italy), the estimation of the mean annual effective infiltration coefficient (AEIC) was conducted by means of an integrated approach based on hydrogeological, hydrological, geomorphological, land use and soil cover analyses. We studied a large part of the southern Apennines that is covered by a meteorological network and containing 40 principal karst aquifers. Using precipitation and air temperature time series gathered through monitoring stations operating in the period 1926–2012, the annual effective precipitation (AEP) was estimated, and its distribution was modelled, by considering the orographic barrier and rain shadow effects of the Apennines chain, as well as the altitudinal control. Four sample karst aquifers with available long spring discharge time series were identified for estimating the AEIC by means of the hydrological budget equation. The resulting AEIC values were correlated with other parameters that control groundwater recharge, such as the extension of outcropping karst-rock, morphological settings, land use and covering soil type. A simple correlation relationship between AEIC, lithology and the summit flat and endorheic areas was found. This empirical model has been used to estimate AEIC and mean annual groundwater recharge in other regional karst aquifers. The estimated AEIC values ranged between 48% and 78%, thus matching intervals estimated for other karst aquifers in European and Mediterranean countries. These results represent a deeper understanding of an aspect of groundwater hydrology in karst aquifers which is fundamental for the formulation of appropriate management models of groundwater resources, also taking into account mitigation strategies for climate change impacts. Finally, the proposed hydrological characterisations are also perceived as useful for the assessment of mean annual runoff over carbonate mountains, which is another important topic concerning water management in the southern Apennines.

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Tesei, Giulio, Marina Allegrezza, Sandro Ballelli, Giampiero Ciaschetti, Carlo Console, Silvia Montecchiari, Cecilia Ottaviani, Gianfranco Pirone et Annarita Frattaroli. « The oldest Pinus nigra plantations in the central Apennines : distribution and floristic-vegetational characterisation ». Plant Sociology 58, n^o 2 (20 décembre 2021) : 15–28. http://dx.doi.org/10.3897/pls2021582/02.

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This paper represents the first syntaxonomic study on the Pinus nigra subsp. nigra artificial stands in the Apennines. It refers exclusively to the mature Pinus nigra forest plantations in the central Apennines that were planted before the 1950s, and then not managed. The mature Pinus nigra forest plantations in the central Apennines are distributed within four National Parks, on limestone substrata, mainly with southern aspects and rugged slopes, and at elevations ranging from 655 m to 1670 m a.s.l.. Two new phytosociological associations are described here and classified in the alliance Junipero communis–Pinion nigrae: Orthilio secundae–Pinetum nigrae and Digitalidi micranthae–Pinetum nigrae. The association Orthilio secundae–Pinetum nigrae comprises the relative mesophilous mature pine forests of the supratemperate thermotype in the plant landscape context of the alliance Aremonio agrimonioidis–Fagion sylvaticae potential vegetation belt. The Digitalidi micranthae–Pinetum nigrae comprises the thermophilous pine forests occurring on rocky stands within mesotemperate and lower supratemperate thermotypes in the potential belt of alliance Carpinion orientalis woods. The comparison of these two new associations and the phytosociological literature concerning the natural communities of Pinus nigra in the Apennines highlights their floristic and coenological autonomy.

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Fornelli, Annamaria, et Giuseppe Piccarreta. « Mineral and chemical provenance indicators in some early Miocene sandstones of the Southern Apennines (Italy) ». European Journal of Mineralogy 9, n^o 2 (26 juin 1997) : 433–48. http://dx.doi.org/10.1127/ejm/9/2/0433.

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Capezzuoli, Enrico, Amalia Spina, Andrea Brogi, Domenico Liotta, Gabriella Bagnoli, Martina Zucchi, Giancarlo Molli et Renzo Regoli. « Reconsidering the Variscan Basement of Southern Tuscany (Inner Northern Apennines) ». Geosciences 11, n^o 2 (12 février 2021) : 84. http://dx.doi.org/10.3390/geosciences11020084.

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The Pre-Mesozoic units exposed in the inner Northern Apennines mostly consist of Pennsylvanian-Permian successions unconformably deposited on a continental crust consolidated at the end of the Variscan orogenic cycle (Silurian-Carboniferous). In the inner Northern Apennines, exposures of this continental crust, Cambrian?-Devonian in age, have been described in Northern Tuscany, Elba Island (Tuscan Archipelago) and, partly, in scattered and isolated outcrops of southern Tuscany. This paper reappraises the most significant succession (i.e., Risanguigno Formation) exposed in southern Tuscany and considered by most authors as part of the Variscan Basement. New stratigraphic and structural studies, coupled with analyses of the organic matter content, allow us to refine the age of the Risanguigno Fm and its geological setting and evolution. Based on the low diversification of palynoflora, the content of sporomorphs, the structural setting and the new field study, this formation is dated as late Tournaisian to Visean (Middle Mississippian) and is not affected by pre-Alpine deformation. This conclusion, together with the already existing data, clearly indicate that no exposures of rocks involved in the Variscan orogenesis occur in southern Tuscany.

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Monaco, CarmeLo, Luigi Tortorici et Werter Paltrinieri. « Structural evolution of the Lucanian Apennines, southern Italy ». Journal of Structural Geology 20, n^o 5 (mai 1998) : 617–38. http://dx.doi.org/10.1016/s0191-8141(97)00105-3.

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Catalano, S., C. Monaco, L. Tortorici, W. Paltrinieri et N. Steel. « Neogene-Quaternary tectonic evolution of the southern Apennines ». Tectonics 23, n^o 2 (4 mars 2004) : n/a. http://dx.doi.org/10.1029/2003tc001512.

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Gattacceca, Jérôme, et Fabio Speranza. « Paleomagnetism of Jurassic to Miocene sediments from the Apenninic carbonate platform (southern Apennines, Italy) : evidence for a 60° counterclockwise Miocene rotation ». Earth and Planetary Science Letters 201, n^o 1 (juillet 2002) : 19–34. http://dx.doi.org/10.1016/s0012-821x(02)00686-6.

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PROSSER, GIACOMO, MARIO BENTIVENGA, MARINELLA A. LAURENZI, ALFREDO CAGGIANELLI, PIERFRANCESCO DELLINO et DOMENICO DORONZO. « Late Pliocene volcaniclastic products from Southern Apennines : distal witness of early explosive volcanism in the central Tyrrhenian Sea ». Geological Magazine 145, n^o 4 (11 avril 2008) : 521–36. http://dx.doi.org/10.1017/s0016756808004512.

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AbstractTwo volcaniclastic successions intercalated in Pliocene basinal clays from the Southern Apennines have been analysed to determine their provenance and their relationship with the geodynamic evolution of the Western Mediterranean. The studied deposits are exclusively made up of ashy pyroclasts, dominated by fresh acidic to intermediate glass, mostly in the form of shards, pumice fragments and groundmass fragments with vitrophyric texture. Crystals include Pl, Opx, Cpx, Hbl and rare Bt. Sedimentological features suggest that the volcanic material accumulated near the basin margin by primary fallout processes and was later remobilized by density currents. 40Ar–39Ar geochronology allowed dating of one succession at 2.24±0.06 Ma, corresponding to the Late Pliocene. Composition of the volcaniclastic material is typical of a transitional high-K calc-alkaline series. The age and chemical composition constrain the provenance of the volcaniclastic rocks from the Southern Tyrrhenian domain. Here, volcanic centres were active during Pliocene time, approximately at the northern end of a volcanic arc formed before the opening of the southernmost part of the sea. This paper shows that a detailed study of volcaniclastic products from the southern Apennines and Calabria can be very useful in collecting new pieces of information on the eruption history of the southern Tyrrhenian domain, since they record additional data not available from the study of exposed volcanic edifices.

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GOVI, GUIDO, GABRIELE FIUMI, JEROME BARBUT, STEFANO SCALERCIO et AXEL HAUSMANN. « An unexpected species complex unveiled in southern European populations of Phragmatiphila nexa (Hübner, [1808]) (Lepidoptera, Noctuidae, Noctuinae, Apameini) ». Zootaxa 5128, n^o 3 (21 avril 2022) : 355–83. http://dx.doi.org/10.11646/zootaxa.5128.3.3.

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DNA barcoding analyses of Phragmatiphila nexa (Hübner, 1808) populations unveiled an unexpected divergence in mtDNA of Italian populations, showing the existence of three allopatric cryptic species. The northernmost BIN is shared with specimens from most other European countries, the southernmost one includes specimens from Basilicata and Calabria regions, and the last BIN includes specimens from Apennines, Sardinia and Corsica. Wing pattern as well as male and female genitalia support the existence of three different species along the Italian peninsula: Phragmatiphila nexa north of the Po River for which we designate a neotype, Phragmatiphila insularis (Turati, 1913), stat. rev. in the Apennines as well as in Sardinia (and Corsica), and Phragmatiphila parenzani sp. n. in the south. The Italian distribution of the genus Phragmatiphila is presented in detail.

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GUGLIELMINO, ADALGISA, et CHRISTOPH BÜCKLE. « Northern Apennines as centre of speciation : a new Verdanus species group (Hemiptera, Cicadomorpha, Cicadellidae) from Italy and its phylogenetic relationships with V. bensoni and the V. limbatellus group ». Zootaxa 2264, n^o 1 (14 octobre 2009) : 1–22. http://dx.doi.org/10.11646/zootaxa.2264.1.1.

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A small sector of Northern Apennines the Tuscan-Emilian Apennines constitutes an interesting diversity centre of a new Verdanus species group closely related to V. bensoni and the V. limbatellus group. It consists of three species: V. tyrannus sp. nov., V. saurosus sp. nov. and V. rosaurus sp. nov., the latter with two subspecies, V. rosaurus rosaurus ssp. nov. and V. rosaurus rex ssp. nov., which doubtless form a monophyletic group (V. rosaurus group). Data on their distribution, ecology and life cycle are added to their original descriptions. The new taxa live allopatrically in a very restricted area and thus occupy a distribution gap of another species group of Verdanus, the V. abdominalis group, present in Italy in the mountain regions of the Alps and Central and Southern Apennines. A hypothesis of the origin of the new taxa is presented based on the ecological conditions in the Tuscan-Emilian Apennines during the last Postglacial period and on the limited dispersal ability of these normally brachypterous insects. Possible synapomorphic characters and phylogenetic relationships of the new taxa with each other and with V. bensoni (China) and the V. limbatellus group (V. limbatellus (Zetterstedt), V. kyrilli (Emeljanov), V. sichotanus (Anufriev), V. kaszabi (Dlabola)) are discussed and a cladistic analysis is conducted. Comparing V. bensoni and the V. limbatellus group on the one hand and the V. rosaurus group on the other, some morphological characters appear to change often in parallel on the same paths, independently from the phylogenetic hypothesis. Remarkably, within the same morphological characters the range of variation among species inhabiting the comparatively minute area of the Tuscan-Emilian Apennines is similar to that found among other taxa distributed across vast areas of northern and central Eurasia.

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Cristofanelli, Paolo, Piero Di Carlo, Eleonora Aruffo, Francesco Apadula, Mariantonia Bencardino, Francesco D’Amore, Paolo Bonasoni et Davide Putero. « An Assessment of Stratospheric Intrusions in Italian Mountain Regions Using STEFLUX ». Atmosphere 9, n^o 10 (22 octobre 2018) : 413. http://dx.doi.org/10.3390/atmos9100413.

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The Mediterranean basin is considered a global hot-spot region for climate change and air quality, especially concerning summer-time ozone (O3). Previous investigations indicated that the Mediterranean basin is a preferred region for stratosphere-to-troposphere exchange (STE) and deep stratospheric intrusion (SI) events. The Lagrangian tool STEFLUX, based on a STE climatology that uses the ERA Interim data, was hereby used to diagnose the occurrence of deep SI events in four mountain regions over the Italian peninsula, spanning from the Alpine region to the southern Apennines. By using near-surface O3 and relative humidity (RH) observations at three high-mountain observatories, we investigated the performance of STEFLUX in detecting deep SI events. Both experimental and STEFLUX detections agreed in describing the seasonal cycle of SI occurrence. Moreover, STEFLUX showed skills in detecting “long-lasting” SI events, especially in the Alps and in the northern Apennines. By using STEFLUX, we found positive tendencies in the SI occurrence during 1979–2017. However, in contrast to similar studies carried out in the Alpine region, the negative long-term (1996–2016) trend of O3 in the northern Apennines did not appear to be related to the SI’s variability.

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Guadagno, F. M., et C. Nunziata. « Seismic velocities of fractured carbonate rocks (southern Apennines, Italy) ». Geophysical Journal International 113, n^o 3 (juin 1993) : 739–46. http://dx.doi.org/10.1111/j.1365-246x.1993.tb04664.x.

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Ferranti, L., E. Santoro, M. E. Mazzella, C. Monaco et D. Morelli. « Active transpression in the northern Calabria Apennines, southern Italy ». Tectonophysics 476, n^o 1-2 (octobre 2009) : 226–51. http://dx.doi.org/10.1016/j.tecto.2008.11.010.

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Frepoli, A., C. Maggi, G. B. Cimini, A. Marchetti et M. Chiappini. « Seismotectonic of Southern Apennines from recent passive seismic experiments ». Journal of Geodynamics 51, n^o 2-3 (mars 2011) : 110–24. http://dx.doi.org/10.1016/j.jog.2010.02.007.

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Esposito, E., R. Pece, S. Porfido et G. Tranfaglia. « Hydrological anomalies connected to earthquakes in southern Apennines (Italy) ». Natural Hazards and Earth System Sciences 1, n^o 3 (30 septembre 2001) : 137–44. http://dx.doi.org/10.5194/nhess-1-137-2001.

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Abstract. The study of hydrological variations in the watersheds of seismic areas can be useful in order to acquire a new knowledge of the mechanisms by which earthquakes can produce hydrological anomalies. Italy has the availability of many long historical series both of hydrological parameters and of seismological data, and is an ideal laboratory to verify the validity of theoretical models proposed by various authors. In this work we analyse the hydrological anomalies associated with some of the big earthquakes that occurred in the last century in the southern Apennines: 1930, 1980 and 1984. For these earthquakes we analysed hydrometric and pluviometric data looking for significant anomalies in springs, water wells and mountain streams. The influence of rainfalls on the normal flows of rivers, springs and wells has been ascertained. Also, the earthquake of 1805, for which a lot of hydrological perturbations have been reported, is considered in order to point out effects imputable to this earthquake that can be similar to the effects of the other big earthquakes. The considered seismic events exhibit different modes of energy release, different focal mechanisms and different propagation of effects on the invested areas. Furthermore, even if their epicentres were not localised in contiguous seismogenetic areas, it seems that the hydrological effects imputable to them took place in the same areas. Such phenomena have been compared with macroseismic fields and transformed in parameters, in order to derive empirical relationships between the dimensions of the event and the characteristics of the hydrological variations. The results of this work point to a close dependence among hydrological anomalies, regional structures and fault mechanisms, and indicate that many clear anomalies have been forerunners of earthquakes. In 1993, the Naples Bureau of the Hydrographic National Service started the continuous monitoring of hydrologic parameters by a network of automatic stations and transmission in real time; presently 7 acquifers are under control in which also pH, T , salinity, electrical conductivity, dissolved oxygen are measured. We envisage to increase the number of monitoring sites and controlled parameters.

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Doglioni, C., P. Harabaglia, G. Martinelli, F. Mongelli et G. Zito. « A geodynamic model of the Southern Apennines accretionary prism ». Terra Nova 8, n^o 6 (novembre 1996) : 540–47. http://dx.doi.org/10.1111/j.1365-3121.1996.tb00783.x.

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Pappone, Gerardo, et Luigi Ferranti. « Thrust tectonics in the Picentini Mountains, Southern Apennines, Italy ». Tectonophysics 252, n^o 1-4 (décembre 1995) : 331–48. http://dx.doi.org/10.1016/0040-1951(95)00094-1.

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Dramis, Francesco, et Adam Kotarba. « Southern limit of relict rock glaciers, Central Apennines, Italy ». Permafrost and Periglacial Processes 3, n^o 3 (juillet 1992) : 257–60. http://dx.doi.org/10.1002/ppp.3430030315.

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BERNARDO, LILIANA, GIOVANNI MAIORCA, FRANCESCO ROMA-MARZIO et LORENZO PERUZZI. « Alyssum doerfleri Degen (Brassicaceae), new for the Italian flora ». Phytotaxa 334, n^o 1 (12 janvier 2018) : 10. http://dx.doi.org/10.11646/phytotaxa.334.1.2.

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Alyssum doerfleri is recorded for the first time in Italy from Monte Sellaro, Pollino National Park (southern Apennines, Calabria). Macro- and micro-morphology (including SEM study of trichomes) and karyology (2n = 16) of the Italian plants are congruent with the data available for Balkan populations. Chorological and conservation features of this species are presented and discussed.

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