Journal articles: 'Stratigraphic Pleistocene'

1

Šeirienė, Vaida, Tatjana Rylova, Alexander Karabanov, Valentinas Baltrūnas, Irina Savchenko, Bronislavas Karmaza, Svetlana Demidova, and Dalia Kisielienė. "The Pleistocene stratigraphy of the south-eastern sector of the Scandinavian glaciation (Belarus and Lithuania) in the light of new data." Baltica 28, no. 1 (June 1, 2015): 51–60. http://dx.doi.org/10.5200/baltica.2015.28.06.

Full text

Abstract:

The paper summarises geological and palaeobotanical investigation data on Pleistocene sediments of recent decades in Lithuania and Belarus. The main problems in Pleistocene stratigraphy and correlation of sections are discussed. As a result the chronostratigraphical correlation chart of Lithuania and Belarus is presented and some changes in local stratigraphic schemes proposed. The majority of the stratigraphical units is comparable and correlates well however some unsolved stratigraphical problems still exist. To solve these problems additional very detail investigations are needed by applying the new modern methods. The lack of the absolute dates of the Pleistocene sediments is the main problem in both countries.

APA, Harvard, Vancouver, ISO, and other styles

2

Gaudenji, Tivadar, and Mladjen Jovanovic. "Quaternary stratigraphy: Recent changes." Glasnik Srpskog geografskog drustva 92, no. 4 (2012): 1–16. http://dx.doi.org/10.2298/gsgd1204001g.

Full text

Abstract:

Corrections to the Quaternary stratigraphic division of Serbia was updated/renewed by lowering limit of the Pleistocene / Quaternary to the beginning of the Gelasian that is at approximately 2.588 million years. Rather than the officially rejected Penck & Br?ckner Alpine stratigraphic model, the use of oxygen isotope stages (OIS / MIS) is recommended. Climatostratigraphic terms glacial and interglacial have a regional applicability and their use is recommended only in areas where there are traces of glaciation, while the terms cold and warm stage (or moderate) stages should be used within the global context. Eopleistocene is a regional term for the former Soviet Union and due to its uniqueness it can hardly be applied in the stratigraphical scheme of the Quaternary depostis in Serbia. With the latest extension of the Lower Pleistocene, further use of Eopleistocene would lead to further confusion in stratigraphic correlation as such the use of the Lower / Early Pleistocene or other appropriate stratigraphic units is recommended.

APA, Harvard, Vancouver, ISO, and other styles

3

Marković, S. B., U. Hambach, T. Stevens, M. Jovanović, K. O'Hara-Dhand, B. Basarin, H. Lu, et al. "Loess in the Vojvodina region (Northern Serbia): an essential link between European and Asian Pleistocene environments." Netherlands Journal of Geosciences - Geologie en Mijnbouw 91, no. 1-2 (September 2013): 173–88. http://dx.doi.org/10.1017/s0016774600001578.

Full text

Abstract:

AbstractLoess deposits in the Vojvodina region, northern Serbia, are among the oldest and most complete loess-paleosol sequences in Europe to date. These thick sequences contain a detailed paleoclimatic record from the late Early Pleistocene. Based on the correlation of detailed magnetic susceptibility (MS) records from Vojvodina with the Chinese loess record and deep-sea isotope stratigraphy we here reconfirm and expand on a stratigraphic model of the Vojvodinian loess-paleosol chronostratigraphic sequence following the Chinese loess stratigraphic system.Variations in MS, dust accumulation rates, and the intensity of pedogenesis demonstrate evidence for a Middle Pleistocene climatic and environmental transition. The onset of loess deposition in Vojvodina also indicates a direct link between dust generation in Europe and that in the interior of Eurasia since the Early Pleistocene. The youngest part of the Early Pleistocene and oldest part of the Middle Pleistocene is characterised by relatively uniform dust accumulation and soil formation rates as well as relatively high magnetic susceptibility values. In contrast, the last five interglacial-glacial cycles are characterised by sharp environmental differences between high dust accumulation rates during the glacials and low rates observed during soil development. The data presented in this study demonstrate the great potential of Vovjodina's loess archives for accurate reconstruction of continental Eurasian Pleistocene climatic and environmental evolution.

APA, Harvard, Vancouver, ISO, and other styles

4

Gaudenyi, Tivadar, Drazenko Nenadic, Mladjen Jovanovic, and Petar Stejic. "The revision of quaternary stratigraphy of the Zrenjanin artesian well borehole profile (Banat, Vojvodina, Serbia)." Annales g?ologiques de la Peninsule balkanique, no. 00 (2022): 7. http://dx.doi.org/10.2298/gabp210306007g.

Full text

Abstract:

The geological analysis of artesian borehole material from Sombor, Subotica, and Zrenjanin, was in the first campaign of detailed stratigraphic studies of Vojvodina in 1892-1895. The results of Quaternary stratigraphy from Zrenjanin were published by HalavAts m ore than a decade later (1914). The significance of the Zrenjanin, Sombor, and Subotica artesian well profiles for more than a century is considered the representative local profiles for the Quaternary stratigraphy of Vojvodina recognized by Serbian (Yugoslavian) and Hungarian geologists. Significant changes were after the taxonomical revision of molluscan material and its stratigraphic context, which was done through the excellent work of Krolopp in the 1970-ies. Unfortunately, the mentioned changes were not applied in the studies during the geological surveying of former Yugoslavia. The developments in Quaternary geology, changes in the Quater nary chronostratigraphic scale, and the results shown by this paper enable the Lower Pleistocene fluvial deposits to be defined as the Pleistocene Corbicula beds, the Viviparus boeckhi Horizon. The Lower Pleistocene at Zrenjanin was documented from 234.54 to 58.36 m depth. The interval between 234.54 and 208.50 m comprises the Upper Paludina - Viviparus vucotinovici zone, while the Viviparus boeckhi Horizons were identified between 135.18 m and 58.36 m. The interval between 58.36 m and 37.75 m is defined as Pleistocene (Lower- and Middle Pleistocene) based on sedimentological and the molluscan record. The interval from 37.75 m to 21.67 m depth was identified as Middle Pleistocene, according to its lithology and the paleontological material. The fluvial sediments? 21.69 m and 7.31 m depths cannot be determined according to the faunistic data; we can only consider them as Pleistocene age. The Holocene sediment and soil horizons ascend to a 2.90 m depth.

APA, Harvard, Vancouver, ISO, and other styles

5

Konradi, P. "Cenozoic stratigraphy in the Danish North Sea Basin." Netherlands Journal of Geosciences 84, no. 2 (July 2005): 109–11. http://dx.doi.org/10.1017/s001677460002299x.

Full text

Abstract:

AbstractThis paper provides a concise review of investigations into the Cenozoic stratigraphy of the Danish North Sea Basin. In the Danish North Sea, mainly Pliocene and Pleistocene strata are found. Results of published seismic and sequence stratigraphic analyses are combined with biostratigraphic analyses and correlated to marine formations found onshore.

APA, Harvard, Vancouver, ISO, and other styles

6

Boreham, S. "The Geology of the Wicken Vision Area, lower Cam valley, Cambridgeshire, UK." Netherlands Journal of Geosciences - Geologie en Mijnbouw 92, no. 1 (April 2013): 47–59. http://dx.doi.org/10.1017/s0016774600000275.

Full text

Abstract:

AbstractThe geology of the Wicken Vision Area in the lower Cam valley is described with reference to a stacked series of ten cross-sections through Holocene and Pleistocene deposits, and Cretaceous/Jurassic bedrock across the region. A detailed cross-section through a Holocene palaeochannel, with radiocarbon dating and pollen analyses is also presented. The structural geology of the bedrock and the stratigraphic arrangement of the Pleistocene and Holocene deposits are used to describe landscape development for the area. This study offers a new understanding of the stratigraphy and context of the Holocene, Weichselian and earlier Pleistocene deposits of the lower Cam valley, and provides a unique view of sediment architecture in valley-fill sediments at the fen edge.

APA, Harvard, Vancouver, ISO, and other styles

7

Aiello, Gemma. "Quaternary Lowstand Prograding Wedges of the Salento Continental Shelf (Southern Adriatic Sea, Italy): Architectural Stacking Patterns and the Control of Glacio-Eustatic Sea Level Fluctuations and Foreland Tectonic Uplift." Geosciences 13, no. 1 (December 22, 2022): 4. http://dx.doi.org/10.3390/geosciences13010004.

Full text

Abstract:

The performance of both the tectonic uplift and of the 4th-order glacial eustatic sea level fluctuations in controlling the stratigraphic architecture of Quaternary lowstand prograding wedges of the Salento continental shelf (Southern Adriatic sea, Italy) during a time interval spanning from the Middle Pleistocene to the Holocene has been pointed out through the interpretation of high-resolution seismic reflection profiles and their correlation to the curves of the isotopic stratigraphy. Three main transgressive surfaces of erosion (RS1, RS2 and RS3) punctuate the stratigraphic architecture of the Salento continental shelf, separating Quaternary lowstand prograding wedges between them. All along the Middle Pleistocene, increasing the tectonic uplift of the Puglia offshore, combining with 4th-order glacio-eustatic variations, have dealt with the pattern of a broad forced regression prograding wedge, favoring a platform progradation of approximately 15 km. The architectural stacking patterns of the overlying Late Pleistocene and Holocene prograding wedges are controlled by 4th-order glacio-eustatic sea level changes, allowing for the formation of incomplete depositional sequences. In this period, the eustatic signature overcomes the tectonic mark, implying a decline in the uplift of the Apulian foreland in the course of the final 250 ky.

APA, Harvard, Vancouver, ISO, and other styles

8

Adamenko, Oleg, Yaroslav Adamenko, and Kateryna Radlovska. "GEOLOGICAL MEMORY OF STARUNJA – AS THE COURSE OF PROTECTION OF THE WORLD NATURAL HERITAGE IN CARPATHIAN REGION OF UKRAINE." Scientific Bulletin Series D : Mining, Mineral Processing, Non-Ferrous Metallurgy, Geology and Environmental Engineering 32, no. 2 (2018): 15–25. http://dx.doi.org/10.37193/sbsd.2018.2.02.

Full text

Abstract:

Paleontological location of the Pleistocene fauna of hairy rhinos and mammoths near the village. Starunya Bogorodchany district of Ivano-Frankivsk region (Prykarpathian, Ukraine) is considered as a paleoclimatic rapper of global changes and a stratigraphic "bridge" linking stratigraphic patterns of the Upper Pleistocene of Western Europe and the plain territory of Ukraine. This is important for the reconstruction of global climate change and the transformation of natural and man-made geosystems.

APA, Harvard, Vancouver, ISO, and other styles

9

Boreham, Steve, and Karolina Leszczynska. "The Geology of the Middle Cam Valley, Cambridgeshire, UK." Quaternary 2, no. 3 (July 12, 2019): 24. http://dx.doi.org/10.3390/quat2030024.

Full text

Abstract:

This study offers a new understanding of the stratigraphy and context of the Pleistocene (including Elsterian and Weichselian) and Holocene deposits of the Middle Cam valley, Cambridgeshire, United Kingdom, and provides a unique and detailed view of the sediment architecture of these valley-fill and interfluve sediments. The new insights into the geology of the area, including dating, pollen analyses, and sediment architecture, are presented with reference to a series of nine cross-sections through Holocene and Pleistocene deposits, as well as Cretaceous bedrock across the region. The structural geology of the bedrock and the stratigraphic arrangement of younger deposits are used to explain the landscape evolution of the area.

APA, Harvard, Vancouver, ISO, and other styles

10

Gruhn, Ruth, and Alan L. Bryan. "A Review of Lynch's Descriptions of South American Pleistocene Sites." American Antiquity 56, no. 2 (April 1991): 342–48. http://dx.doi.org/10.2307/281423.

Full text

Abstract:

The description of major South American Pleistocene sites by Lynch (1990) contains significant errors and omissions. The artifact assemblage at the Colombian site of Tibitó, dated at 11,740 ± 140 B.P., is much larger than indicated by Lynch and well represents the Abriense industry, which features small unifacially retouched flake tools and core tools, with no stone projectile points. Lynch did not describe the 1976 stratigraphic profile at the Venezuelan site of Taima-Taima, and he failed to refer to the evidence for butchering of the juvenile mastodon with which an El Jobo projectile point fragment and a utilized flake were associated directly. The descriptions of Brazilian sites also feature serious mistakes. For the site of Alice Boër, Lynch overlooked a thick sterile stratigraphic unit (Bed IV) that intervenes between Bed III, with its thermoluminescence dates as early as 10,970 ± 1020 B.P. and radiocarbon dates as early as 14,200 ± 1150 B.P., and the artifact-bearing surface of Bed V. For Lapa Vermelha, Lynch failed to indicate that several artifacts were recovered from an older cemented cave fill that yielded radiocarbon dates of 22,410 B.P. and > 25,000 B.P. Lynch’s description of the site of Toca do Boqueirào da Pedra Furada does not correspond to eyewitness reports, and his description of the nearby Toca do Sitio do Meio was incomplete and confused. Finally, in his description of the stratigraphy of the Patagonian site of Los Toldos, Cueva 3 Lynch misquoted and misconstrued the original reports, which indicate clearly the stratigraphic priority and integrity of the Level 11 industry. For accurate descriptions of early South American archaeological sites, readers are urged to examine the original sources.

APA, Harvard, Vancouver, ISO, and other styles

11

Bakhmutov, V. G., D. V. Hlavatskyi, Y. M. Veklych, V. V. Shpyra, and V. I. Yakukhno. "The Matuyama—Brunhes boundary in the loess-palaeosol sequence of Dolynske, southern Ukraine." Geofizicheskiy Zhurnal 43, no. 5 (November 24, 2021): 95–110. http://dx.doi.org/10.24028/gzh.v43i5.244065.

Full text

Abstract:

We present the results of a palaeomagnetic study of the Early—Middle Pleistocene deposits exposed on the left bank of the River Danube at Dolynske, southern Ukraine. A thick succession of water-lain facies is succeeded by stratigraphically complete loess-palaeosol sequence; these constitute a unique palaeoclimate archive in the southern margin of the East European loess province. The Matuyama—Brunhes boundary (MBB) has been detected at the bottom of the Lower Shyrokyne (S7S3) subunit and not in the Martonosha (S6) unit as previously thought. New data align with previous results from the Roksolany and Vyazivok sections, where the MBB was determined at the same stratigraphical level in the S7S3 soil. In contrast to terrestrial Pleistocene records in China and сentral Europe, where the MBB was regularly determined in a loess layer (representing a cold period), the MBB in the Ukrainian subaerial succession is located in the soil unit (representing a warm period). Furthermore, eight, and not seven, glacial-interglacial cycles are recorded in the Brunhes chron. This may indicate the stratigraphic completeness of the loess-soil succession of Ukraine, which can be compared with the reference global marine and terrestrial palaeoclimatic archives. Further palaeomagnetic studies of loess-palaeosol sequences of other regions of Ukraine will allow revision and correlation of still inconsistent stratigraphic and magnetostratigraphic schemes of the Pleistocene deposits.

APA, Harvard, Vancouver, ISO, and other styles

12

Lim, Hyoun Soo, Yong Il Lee, Seonbok Yi, Cheong-Bin Kim, Chull-Hwan Chung, Heon-Jong Lee, and Jeong Heon Choi. "Vertebrate burrows in late pleistocene paleosols at Korean Palaeolithic sites and their significance as a stratigraphic marker." Quaternary Research 68, no. 2 (September 2007): 213–19. http://dx.doi.org/10.1016/j.yqres.2007.05.001.

Full text

Abstract:

AbstractA vertebrate burrow-bearing layer of late Pleistocene age is commonly found at many Paleolithic archaeological sites in Korea. The burrows are straight to slightly curved in horizontal (plan) view and gently inclined in lateral (sectional) view. They are interpreted as having been produced by rodent-like mammals based on their size and architecture. The significance of such burrow-bearing layers as a characteristic stratigraphic marker unit is demonstrated by high burrow abundance, consistent stratigraphic position, lack of stratigraphic recurrence at these sites, and widespread geographic extent. Three dating methods, tephrochronology, radiocarbon, and OSL dating, were used to infer the age of these burrow-bearing layers. The dating results indicate that they were formed between ca. 40,000 and 25,000 yr (MIS 3−2), and this suggests that this layer can be used as a stratigraphic time-marker in late Pleistocene paleosol sequences for this region.

APA, Harvard, Vancouver, ISO, and other styles

13

Stumpf, Andrew J., and Ahmed Ismail. "High-resolution seismic reflection profiling: an aid for resolving the Pleistocene stratigraphy of a buried valley in central Illinois, USA." Annals of Glaciology 54, no. 64 (2013): 10–20. http://dx.doi.org/10.3189/2013aog64a602.

Full text

Abstract:

Abstract High-resolution seismic reflection (HRSR) data acquired over the Pesotum Bedrock Valley in central Illinois, USA, helped construct the seismic stratigraphy of a valley fill and the overlying sediments. Integrating these data with drilling and borehole geophysics allowed us to develop a seismo-stratigraphic classification for sediments on undulating and folded bedrock. Seven seismo-stratigraphic units that overlie the bedrock surface were characterized. Seismic units A and B include glacial sediments of multiple Pleistocene glaciations above the Pesotum Bedrock Valley, which completely mask the feature. Seismic units C–F, the valley fill, primarily include tills and glacial lake sediment deposited during the earliest Pleistocene glaciations and preglacial alluvium and colluvium that is draped over in situ weathered bedrock. The preservation of conformable-lying glacial and preglacial deposits and paucity of sand and gravel in the buried valley strongly indicate that little or no incision by glacial meltwaters has occurred. These observations contrast markedly with interpretations from buried valleys elsewhere in North America and northern Europe where valley fills contain significant deposits of sand and gravel in tunnel valleys. The HRSR data assisted the characterization and analysis of heterogeneous sedimentary sequences over a buried valley where existing subsurface information was limited. The extent of Pleistocene-age glacial lakes is inferred from the lateral continuity of silt and clay units.

APA, Harvard, Vancouver, ISO, and other styles

14

Bloos, Gert. "The stratigraphic position of Homo steinheimensis (late Middle Pleistocene, SW Germany)." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 302, no. 2 (November 29, 2021): 169–208. http://dx.doi.org/10.1127/njgpa/2021/1027.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Baryshnikov, G. F. "Pleistocene felidae (Mammalia, Carnivora) from the Kudaro Paleolithic sites in the Caucasus." Proceedings of the Zoological Institute RAS 315, no. 3 (September 23, 2011): 197–226. http://dx.doi.org/10.31610/trudyzin/2011.315.3.197.

Full text

Abstract:

The Kudaro Paleolithic site complex in Southern Ossetia includes five species of felids: Panthera onca gombaszoegensis, P. spelaea, P. pardus, Felis silvestris and possibly Lynx lynx. The fossil jaguar P. onca gombaszoegensis was identified from the lowest stratigraphic level of the Middle Pleistocene (Likhvian = Holsteinian Interglacial). Remains of P. pardus and Felis silvestris were recovered from all layers. Panthera spelaea and Lynx lynx represent northern migrants appeared there at the end of the Middle Pleistocene and Late Pleistocene respectively.

APA, Harvard, Vancouver, ISO, and other styles

16

Syromyatnikova, Elena, Alexey Tesakov, Serdar Mayda, Tanju Kaya, and Gerçek Saraç. "Plio-Pleistocene Amphibians and Reptiles from Central Turkey: New Faunas and Faunal Records with Comments on their Biochronological Position Based on Small Mammals." Fossil Imprint 75, no. 3-4 (December 1, 2019): 343–58. http://dx.doi.org/10.2478/if-2019-0022.

Full text

Abstract:

Abstract Small fossil vertebrates from several Pliocene and Pleistocene localities in Central Anatolia (Turkey) are reviewed. Data on small mammals represent assemblages from the early Pliocene (MN 14: Nasrettinhoca 1, 2 and Hamamkarahisar A, B), and late Pliocene (MN 16: Hoyhoytepe 1, 2, 3 and Mercan 1); Early Pleistocene (MN 17: Mercan 2), and Middle Pleistocene (MQ 1/MQ 2: Yenişarbademli). The biochronology related characters of arvicolines Promimomys, Mimomys, Microtus, Lagurus and Clethrionomys are briefly discussed. Data on the systematics of fossil amphibians and reptiles is also described from these localities. The early Pliocene (MN 14) assemblages significantly add to knowledge on the herpetofaunal composition of this stratigraphic level, which until now was poorly characterized in Turkey. Remains of Pelobatidae, Bufonidae, Ranidae, Amphisbaenia and Natricinae are reported for the first time from the MN 14 biozone of Turkey. Palaeobatrachus from Mercan 1 extends the temporal range of this group in the Eastern Mediterranean into the late Pliocene. The described remains of amphibians and reptiles from Turkey span a considerable stratigraphic range from the early Pliocene to the Middle Pleistocene (time interval of about 5 Ma) and partly fill a gap in the palaeoherpetofaunal record of the Eastern Mediterranean.

APA, Harvard, Vancouver, ISO, and other styles

17

Hlavatskyi, Dmytro, and Vladimir Bakhmutov. "Early–Middle Pleistocene Magnetostratigraphic and Rock Magnetic Records of the Dolynske Section (Lower Danube, Ukraine) and Their Application to the Correlation of Loess–Palaeosol Sequences in Eastern and South-Eastern Europe." Quaternary 4, no. 4 (December 2, 2021): 43. http://dx.doi.org/10.3390/quat4040043.

Full text

Abstract:

We present new palaeomagnetic and rock magnetic results with a stratigraphic interpretation of the late Early–Middle Pleistocene deposits exposed on the left bank of the River Danube at Dolynske, southern Ukraine. A thick succession of water-lain facies is succeeded by reddish-brown clayey soils, topped by a high-resolution loess–palaeosol sequence. These constitute one of the most complete recently discovered palaeoclimate archives in the Lower Danube Basin. The suggested stratigraphy is based on the position of the Matuyama–Brunhes boundary, rock magnetic, palaeopedological and sedimentological proxies, and it is confidently correlated with other loess records in the region (Roksolany and Kurortne), as well as with the marine isotope stratigraphy. The magnetic susceptibility records and palaeosol characteristics at Dolynske show an outstanding pattern that is transitional between eastern and south-eastern European loess records. Our data confirm that the well-developed S4 soil unit in Ukraine, and S5 units in Romania, Bulgaria and Serbia, correlate with the warm MIS 11. Furthermore, we suggest the correlation of rubified S6 palaeosols in Romania and Bulgaria and the V-S7–V-S8 double palaeosol in Serbia with S6 in Ukraine, a strong Mediterranean-type palaeosol which corresponds to MIS 15. Our new results do not support the hypothesis of a large magnetic lock-in depth like that previously interpreted for the Danube loess, and they prove that the Matuyama–Brunhes boundary is located within the palaeosol unit corresponding to MIS 19. The proposed stratigraphic correlation scheme may serve as a potential basis for further regional and global Pleistocene climatic reconstructions.

APA, Harvard, Vancouver, ISO, and other styles

18

HALL, Adrian M., Jon W. MERRITT, E. Rodger CONNELL, and Alun HUBBARD. "Early and Middle Pleistocene environments, landforms and sediments in Scotland." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 110, no. 1-2 (October 4, 2018): 5–37. http://dx.doi.org/10.1017/s1755691018000713.

Full text

Abstract:

ABSTRACTThis paper reviews the changing environments, developing landforms and terrestrial stratigraphy during the Early and Middle Pleistocene stages in Scotland. Cold stages after 2.7 Ma brought mountain ice caps and lowland permafrost, but larger ice sheets were short-lived. The late Early and Middle Pleistocene sedimentary record found offshore indicates more than 10 advances of ice sheets from Scotland into the North Sea but only 4–5 advances have been identified from the terrestrial stratigraphy. Two primary modes of glaciation, mountain ice cap and full ice sheet modes, can be recognised. Different zones of glacial erosion in Scotland reflect this bimodal glaciation and the spatially and temporally variable dynamics at glacier beds. Depths of glacial erosion vary from almost zero in Buchan to hundreds of metres in glens in the western Highlands and in basins both onshore and offshore. The presence of tors and blockfields indicates repeated development of patches of cold-based, non-erosive glacier ice on summits and plateaux. In lowlands, chemical weathering continued to operate during interglacials, but gruss-type saprolites are mainly of Pliocene to Early Pleistocene age. The Middle Pleistocene terrestrial stratigraphic record in Scotland, whilst fragmentary and poorly dated, provides important and accessible evidence of changing glacial, periglacial and interglacial environments over at least three stadial–interstadial–interglacial cycles. The distributions of blockfields and tors and the erratic contents of glacial sediments indicate that the configuration, thermal regime and pattern of ice flow during MIS 6 were broadly comparable to those of the last ice sheet. Improved control over the ages of Early and Middle Pleistocene sediments, soils and saprolites and on long-term rates of weathering and erosion, combined with information on palaeoenvironments, ice extent and sea level, will in future allow development and testing of new models of Pleistocene tectonics, isostasy, sea-level change and ice sheet dynamics in Scotland.

APA, Harvard, Vancouver, ISO, and other styles

19

Pyle, David M., Tjeerd H. van Andel, Panayiotis Paschos, and Paul van den Bogaard. "An Exceptionally Thick Middle Pleistocene Tephra Layer from Epirus, Greece." Quaternary Research 49, no. 3 (May 1998): 280–86. http://dx.doi.org/10.1006/qres.1998.1963.

Full text

Abstract:

A newly recognized 2-m-thick trachytic volcanic ash deposit from northwestern Greece is dated at 374,000 ± 7000 yr and correlated with the Middle Pleistocene volcanic activity of central Italy. The deposit represents ash fallout from one of the largest volcanic eruptions in Europe of the past 400,000 yr and should provide an important stratigraphic marker within the poorly dated Middle Pleistocene deposits of Italy and Greece.

APA, Harvard, Vancouver, ISO, and other styles

20

Yulianto, Eko, Woro Sri Sukapti, and Ruly Setiawan. "Palynostratigraphy, Paleoecology and Paleoclimatology of Early Pleistocene Based on Pollen Study of Pucangan Formation in Sangiran Area." Jurnal Geologi dan Sumberdaya Mineral 20, no. 3 (June 26, 2019): 133. http://dx.doi.org/10.33332/jgsm.geologi.20.3.133-141.

Full text

Abstract:

A pollen study has been conducted on samples taken from Pucangan Formation in Sangiran area. This study aims to reconstruct palynostratigraphy and to reveal environmental dynamics along with the deposition of Pucangan Formation with an emphasis on the influence of high frequency volcanism to the vegetational landscape in the montane area. The co-occurrence of Phyllocladus hypophyllus and Podocarpus imbricatus indicates Plistocene age of samples, and their stratigraphic position overlied by Middle Pleistocene Kabuh Formation leads to a conclusion of Early Pleistocene. All samples are included in Monoporites annulatus Peak Zone and subdivided into three Peak Subzone i.e. Polypodisporites radiates, Psilotum nudum, Magnastriatites grandiosa, Cyathea sp. and Laevigatosporites sp. Concurrent Peak Subzone, Interval Subzone between two Peak Subzones i.e. Polypodisporites radiates, Psilotum nudum, Magnastriatites grandiosa, Cyathea sp., Laevigatosporites sp. Concurrent Peak Subzone and Casuarina sp. Peak Subzone. Along with the deposition of Pucangan Formation, savannah with sparse swamp, riparian and lowland forest spreaded out around particularly on lowland, while few mangrove forest grew on muddy sea-land interface environment and heterogenous montane forests occupied highland. During the deposition of stratigraphic profile, savannah got flourished on new emerged land due to regression. Frequent volcanic eruptions along with the deposition of the upper stratigraphic profile has destroyed heterogenous montane forest and led to the homogenous Casuarina junghuniana forest.Keywords: Palynology, Early Pleistocene, vegetational landscape, savannah, montane forest, regression, volcanism

APA, Harvard, Vancouver, ISO, and other styles

21

Yulianto, Eko, Woro Sri Sukapti, and Ruly Setiawan. "Palynostratigraphy, Paleoecology and Paleoclimatology of Early Pleistocene Based on Pollen Study of Pucangan Formation in Sangiran Area." Jurnal Geologi dan Sumberdaya Mineral 20, no. 3 (June 26, 2019): 133. http://dx.doi.org/10.33332/jgsm.geologi.v20i3.461.

Full text

Abstract:

A pollen study has been conducted on samples taken from Pucangan Formation in Sangiran area. This study aims to reconstruct palynostratigraphy and to reveal environmental dynamics along with the deposition of Pucangan Formation with an emphasis on the influence of high frequency volcanism to the vegetational landscape in the montane area. The co-occurrence of Phyllocladus hypophyllus and Podocarpus imbricatus indicates Plistocene age of samples, and their stratigraphic position overlied by Middle Pleistocene Kabuh Formation leads to a conclusion of Early Pleistocene. All samples are included in Monoporites annulatus Peak Zone and subdivided into three Peak Subzone i.e. Polypodisporites radiates, Psilotum nudum, Magnastriatites grandiosa, Cyathea sp. and Laevigatosporites sp. Concurrent Peak Subzone, Interval Subzone between two Peak Subzones i.e. Polypodisporites radiates, Psilotum nudum, Magnastriatites grandiosa, Cyathea sp., Laevigatosporites sp. Concurrent Peak Subzone and Casuarina sp. Peak Subzone. Along with the deposition of Pucangan Formation, savannah with sparse swamp, riparian and lowland forest spreaded out around particularly on lowland, while few mangrove forest grew on muddy sea-land interface environment and heterogenous montane forests occupied highland. During the deposition of stratigraphic profile, savannah got flourished on new emerged land due to regression. Frequent volcanic eruptions along with the deposition of the upper stratigraphic profile has destroyed heterogenous montane forest and led to the homogenous Casuarina junghuniana forest.Keywords: Palynology, Early Pleistocene, vegetational landscape, savannah, montane forest, regression, volcanism

APA, Harvard, Vancouver, ISO, and other styles

22

Martin, Robert A., Ryan T. Hurt, James G. Honey, and Pablo Peláez-Campomanes. "Late Pliocene and early Pleistocene rodents from the northern Borchers Badlands (Meade County, Kansas), with comments on the Blancan-Irvingtonian boundary in the Meade Basin." Journal of Paleontology 77, no. 5 (September 2003): 985–1001. http://dx.doi.org/10.1017/s0022336000044814.

Full text

Abstract:

New fossiliferous localities in the Borchers Badlands of southwestern Kansas add to our knowledge of rodent community change across the Plio-Pleistocene and Blancan-Irvingtonian boundaries. We report fossil rodents from ten local faunas in the Badlands that range stratigraphically from beneath the Huckleberry Ridge ash (2.10 Ma [million years ago]) to a level just beneath the Cerro Toledo B ash (1.23–1.47 Ma). The late Blancan Borchers local fauna (l.f.), includes the Meade Basin highest stratigraphic datum (HSD) for the following taxa that characterize or are found in earlier Blancan faunas:Alilepus, Geomys quinni, Sigmodon minor, andGeochelone. Borchers currently also has the HSDs forReithrodontomys pratincolaandOndatra zibethicus lidahoensis, but the prior temporal distribution of these taxa in the Meade Basin is unknown. The stratigraphically lowest Pleistocene (Irvingtonian) l.f. in the Badlands, Nash 72, includes the lowest stratigraphic datum (LSD) forCynomys, Reithrodontomys moorei, Microtus, andMictomys kansasensis, all of which are found above Nash 72 and beneath the Cerro Toledo B ash.Prodipodomysis last seen at Nash 72, andSigmodon curtisiis first encountered at Short Haul, a locality slightly younger than Nash 72. A preliminary hypothesis of age based on stratigraphic position places the Nash 72 l.f. at about 1.80 Ma, suggesting that this fauna and the genusMicrotusmay characterize both the Plio-Pleistocene and Blancan-Irvingtonian boundaries in the Borchers Badlands.

APA, Harvard, Vancouver, ISO, and other styles

23

MERRITT, Jon W., Adrian M. HALL, John E. GORDON, and E. Rodger CONNELL. "Late Pleistocene sediments, landforms and events in Scotland: a review of the terrestrial stratigraphic record." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 110, no. 1-2 (March 2019): 39–91. http://dx.doi.org/10.1017/s1755691018000890.

Full text

Abstract:

ABSTRACTLithostratigraphical studies coupled with the development of new dating methods has led to significant progress in understanding the Late Pleistocene terrestrial record in Scotland. Systematic analysis and re-evaluation of key localities have provided new insights into the complexity of the event stratigraphy in some regions and the timing of Late Pleistocene environmental changes, but few additional critical sites have been described in the past 25 years. The terrestrial stratigraphic record remains important for understanding the timing, sequence and patterns of glaciation and deglaciation during the last glacial/interglacial cycle. Former interpretations of ice-free areas in peripheral areas during the Last Glacial Maximum (LGM) are inconsistent with current stratigraphic and dating evidence. Significant challenges remain to determine events and patterns of glaciation during the Early and Middle Devensian, particularly in the context of offshore evidence and ice sheet modelling that indicate significant build-up of ice throughout much of the period. The terrestrial evidence broadly supports recent reconstructions of a highly dynamic and climate-sensitive British–Irish Ice Sheet (BIIS), which apparently reached its greatest thickness in Scotland between 30 and 27ka, before the global LGM. A thick (relative to topography) integrated ice sheet reaching the shelf edge with a simple ice-divide structure was replaced after the LGM by a much thinner one comprising multiple dispersion centres and a more complex flow structure.

APA, Harvard, Vancouver, ISO, and other styles

24

Geirsdóttir, Áslaug, and Jón Eiríksson. "Growth of an Intermittent Ice Sheet in Iceland during the Late Pliocene and Early Pleistocene." Quaternary Research 42, no. 2 (September 1994): 115–30. http://dx.doi.org/10.1006/qres.1994.1061.

Full text

Abstract:

AbstractDeep-sea paleoclimatic records show that the Quaternary climate around Iceland was, and probably still is, very sensitive to rapid shifts in North Atlantic oceanic circulation. Studies of several key sections in Iceland indicate that similar oscillations are reflected in the late Pliocene and early Pleistocene terrestrial stratigraphy. Correlations between six rock sequences in western, northern, eastern, and southern Iceland show a fairly distinct trend during the Pliocene-Pleistocene transition indicating the progressive growth of an ice sheet from southeast toward the north and west. The correlations are based on K/Ar dates and paleomagnetic studies. A total of 11 glacial horizons are recorded in a stratigraphic column from eastern Iceland extending back 6.5 myr. In western Iceland, 7 glacial horizons are preserved in a rock section dated from 7.0 to 1.8 myr, and in northern Iceland 14 glacial horizons are identified in a section that extends back to 9.0 myr. Well over 20 glacial horizons have been identified in the stratigraphic column in Iceland. Full-scale glacial-interglacial cyclicity with regional ice cover is indicated at approximately 2.6 myr. A further amplification leading to islandwide glaciations is identified at 2.2-2.1 myr. These results show that changes in the ice cover in Iceland correlate with the deep-sea oxygen isotope records from benthic and planktonic foraminifera as well as IRD studies from the North Atlantic.

APA, Harvard, Vancouver, ISO, and other styles

25

Knezevic, Slobodan, Drazenko Nenadic, Barbara Radulovic, Katarina Bogicevic, and Jelena Zaric. "Stratigraphic characteristics of quaternary deposits on the left bank of the Sava River near Belgrade." Annales g?ologiques de la Peninsule balkanique 79, no. 1 (2018): 21–30. http://dx.doi.org/10.2298/gabp1879021k.

Full text

Abstract:

Quaternary deposits on the banks of the Sava River in the Belgrade area have a significant thickness and they are represented by genetically different formations. The data about these sediments were obtained by exploration of two relatively shallow boreholes, RB 47/P-1 and RB 53/P-1, located on the left bank of the Sava River. Two genetic entities are distinguished: the lacustrine-palustrine deposits of Plio-Pleistocene age and alluvial deposits of Pleistocene and Holocene age. Deposits of the Plio-Pleistocene are clearly different, both lithologically and palaeontologically, from the overlying alluvial deposits. Lithologically similar fluvial deposits of the Pleistocene and Holocene age were distinguished according to their palaeontological characteristics, particulary by the presence of bivalve genera Corbicula and Dreissena.

APA, Harvard, Vancouver, ISO, and other styles

26

Маtveyev, A. V., Т. B. Rylova, S. V. Demidova, and Т. V. Yakubovskaya. "Changes in stratigraphic charts of neogene and quaternary deposits of Belarus due to the revision of the boundary between systems." Doklady of the National Academy of Sciences of Belarus 63, no. 3 (June 28, 2019): 350–59. http://dx.doi.org/10.29235/1561-8323-2019-63-3-350-359.

Full text

Abstract:

Following the decision of the International Union of Geological Sciences on the transfer of the lower boundary of the Quaternary System/Period and the Pleistocene Series/Epoch from 1.8 Ma to 2.58 Ma (to the base of the Gelazian Stage/ Age of the Pliocene), the changes have been made in Stratigraphic charts of Neogene and Quaternary Deposits of Belarus (2010). The Neogene – Quaternary boundary in the territory of Belarus is aligned with the International Chronostratigraphic Chart and is made between the Kholmech horizon (analogue of Zanclean and Piacenzian, Pliocene) and the Dvorets horizon (analogue of Gelasian) displaced from the Pliocene to the lower base of the lowermost Pleistocene. Its new position in the sections is substantiated by paleobotanical data. New geological units were introduced into regional and local stratigraphic charts of the Neogene and Quaternary.

APA, Harvard, Vancouver, ISO, and other styles

27

Akulov, N. I., I. M. Mashchuk, and V. V. Akulova. "Pleistocene sediments of Lake Baikal: Lithology and stratigraphic correlation." Stratigraphy and Geological Correlation 23, no. 1 (January 2015): 94–113. http://dx.doi.org/10.1134/s0869593815010025.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

INOZEMTSEV, Yu I., O. O. PARISHEV, M. O. MASLAKOV, O. M. RYBAK, and L. V. STUPINA. "Stratigraphy of the Upper Pleistocene<Holocene deposits of the Black and Azov seas." Geology and Mineral Resources of World Ocean 17, no. 2 (2021): 34–53. http://dx.doi.org/10.15407/gpimo2021.02.034.

Full text

Abstract:

The results of comparison of stratigraphic sections of Upper Pleistocene-Holocene sediments of the Black and Azov Seas, the main stratotypic areas: the Kerch Strait, the northwestern shelf of the Black Sea, the Azov Sea and its southern shores. It was established that in the post-Karangate time, as a result of fluctuations in the level of the World Ocean and the Ponto-Caspian basin connected with it through the Bosporus Strait, the character of sedimentation, and above all, the distribution in it of Mediterranean and Caspian mollusc complexes is the main criterion for the character of sedimentation and correlation of stratigraphic horizons. It has been established that the Kerch Strait presents a complex section formed by repeated alternation of marine and river sediments with their accompanying complex of mollusks, which served as the basis for the separation of such stratigraphic horizons as Surozh, Alan, Gorkan, Enikale. In other parts of marine areas similar or close to them types of sediments are called Kazantip in the Azov Sea and Tarhankut in the Karkinit Gulf of the northwestern shelf of the Black Sea. The stratigraphic correlation of different facies sediments in different parts of the shelf of the Black and Azov Seas requires further more detailed study of sedimentation conditions, with regard to the timing of the Caspian fauna representatives in the Upper Pleistocene-Holocene sediments of the Azov-Black Sea basin.

APA, Harvard, Vancouver, ISO, and other styles

29

Hart, Isaac, Kaylee B. Jones, Andrea Brunelle, Jennifer DeGraffenried, Charles G. Jack Oviatt, Barbara Nash, Daron Duke, and D. Craig Young. "BUILDING A MASTER CHRONOLOGY FOR THE WESTERN LAKE BONNEVILLE BASIN WITH STRATIGRAPHIC AND ELEMENTAL DATA FROM MULTIPLE SITES, USA." Radiocarbon 64, no. 1 (February 2022): 69–85. http://dx.doi.org/10.1017/rdc.2022.3.

Full text

Abstract:

ABSTRACTWe present a novel approach to developing a unified radiocarbon-based chronology for multiple sediment cores from a location where radiocarbon dating is challenging. We used 36 radiocarbon ages from eight terminal Pleistocene and Holocene sediment cores with correlated stratigraphies. Stratigraphic correlation was accomplished using a combination of high-resolution photography, high-resolution X-ray fluorescence-based elemental composition data, and volcanic tephra identification. Results show that despite problems associated with potential contamination or radiocarbon reservoir effect, a useful age-depth model has been created for the correlated lacustrine sections of these eight sediment cores, providing chronological controls for future paleoenvironmental analyses of the cores.

APA, Harvard, Vancouver, ISO, and other styles

30

Zhou, Weijian, Zhisheng An, A. J. T. Jull, D. J. Donahue, and M. J. Head. "Reappraisal of Chinese Loess Plateau Stratigraphic Sequences Over the Last 30,000 Years: Precursors of an Important Holocene Monsoon Climatic Event." Radiocarbon 40, no. 2 (1997): 905–13. http://dx.doi.org/10.1017/s0033822200018877.

Full text

Abstract:

Through the establishment of radiocarbon chronozones relating common geological events within lacustrine and eolian sediments from five profiles representative of loess yuan (tablelands), river valley and northwest margin features of the Loess Plateau, we propose a series of stratigraphic divisions within the last 30 ka. The focus of this detailed study involves stratigraphic relationships contributing to evidence of Younger Dryas events, with the recognition of cold-dry, cool-wet and cold-dry periods represented within the Heiheze silt, Midiwan peat and Liushuwan eolian sand. The stratigraphic profiles reflect century-scale fluctuations of the East Asian monsoons. The precursor events enable us to place the Pleistocene/Holocene boundary at 10,000 bp.

APA, Harvard, Vancouver, ISO, and other styles

31

Huckleberry, Gary, Charlotte Beck, George T. Jones, Amy Holmes, Michael Cannon, Stephanie Livingston, and Jack M. Broughton. "Terminal Pleistocene/Early Holocene Environmental Change at the Sunshine Locality, North-Central Nevada, U.S.A." Quaternary Research 55, no. 3 (May 2001): 303–12. http://dx.doi.org/10.1006/qres.2001.2217.

Full text

Abstract:

AbstractSedimentological, faunal, and archaeological investigations at the Sunshine Locality, Long Valley, Nevada reveal a history of human adaptation and environmental change at the last glacial–interglacial transition in North America's north-central Great Basin. The locality contains a suite of lacustrine, alluvial, and eolian deposits associated with fluvially reworked faunal remains and Paleoindian artifacts. Radiocarbon-dated stratigraphy indicates a history of receding pluvial lake levels followed by alluvial downcutting and subsequent valley filling with marsh-like conditions at the end of the Pleistocene. A period of alluvial deposition and shallow water tables (9,800 to 11,000 14C yr B.P.) correlates to the Younger Dryas. Subsequent drier conditions and reduced surface runoff mark the early Holocene; sand dunes replace wetlands by 8,000 14C yr B.P. The stratigraphy at Sunshine is similar to sites located 400 km south and supports regional climatic synchroneity in the central and southern Great Basin during the terminal Pleistocene/early Holocene. Given regional climate change and recurrent geomorphic settings comparable to Sunshine, we believe that there is a high potential for buried Paleoindian features in primary association with extinct fauna elsewhere in the region yet to be discovered due to limited stratigraphic exposure and consequent low visibility.

APA, Harvard, Vancouver, ISO, and other styles

32

Gaudioso, Pablo Javier, Germán M. Gasparini, Rafael Herbst, and Rubén Mario Barquez. "First record of the Neolicaphrium recens Frenguelli, 1921 (Mammalia, Litopterna) in the Pleistocene of Santiago del Estero Province, Argentina." Papéis Avulsos de Zoologia (São Paulo) 57, no. 3 (March 16, 2017): 23. http://dx.doi.org/10.11606/0031-1049.2017.57.03.

Full text

Abstract:

The first record of the Neolicaphrium recens Frenguelli, 1921 (Mammalia, Litopterna) from Pleistocene deposits of the Río Dulce, Rio Hondo Department, Santiago del Estero Province, Argentina, is reported. The morphology and morphometry observed in the specimen MPAT073 is coincident with the diagnostic characteristics of that species. This finding represents the northernmost and westernmost record of the species, and thus extends its geographical distribution. Geological data suggest that the material comes from a still unnamed Pleistocene stratigraphic unit.

APA, Harvard, Vancouver, ISO, and other styles

33

Woźniak, Piotr Paweł, Robert J. Sokołowski, Piotr Czubla, and Stanisław Fedorowicz. "Stratigraphic Position of Tills in the Orłowo Cliff Section (Northern Poland): A New Approach." Studia Quaternaria 35, no. 1 (June 1, 2018): 25–40. http://dx.doi.org/10.2478/squa-2018-0002.

Full text

Abstract:

Abstract The site at Orłowo Cliff was used to analyse the stratigraphic position and palaeogeographic interpretations of the properties and depositional conditions of two basal tills from the Late Pleistocene. A multi-proxy approach involved lithofacies, petrographic analysis of the fine gravel fraction, analyses of indicator erratics and till fabric. TL dating of intra-moraine deposits was used to determine depositional time frames of tills. The sediment profile at Orłowo Cliff shows a distinct reduction in number of Pleistocene units. Obtained dating results suggest the presence of Middle and Late Pleistocene fluvial units. The main issue discussed is the stratigraphic position of the older till (Unit O-4). It can be assumed that this till was deposited probably during the Middle Weichselian (MIS4). At Orłowo Horn the till of Unit O-4 reveals incorporation of the erratic material derived from an older till in the surrounded area (according to petrographic composition - probably from MIS 8). The younger till (Unit O-6) was deposited in the Late Weichselian (MIS 2). Moreover, the till of Unit O-6 is characterised by a significant shift towards the south-west in terms of the erratic origin in Unit O-4.

APA, Harvard, Vancouver, ISO, and other styles

34

Prado, José Luis, María Teresa Alberdi, and Jonathan Bellinzoni. "Pleistocene Mammals from Pampean Region (Argentina). Biostratigraphic, Biogeographic, and Environmental Implications." Quaternary 4, no. 2 (May 11, 2021): 15. http://dx.doi.org/10.3390/quat4020015.

Full text

Abstract:

The Pampean Region contains sedimentary sequences with abundant mammal fossil records, which constitute the chronological outline of the Plio–Pleistocene of South America. These classic localities have been used for more than a century to correlate with other South American regions. Throughout this time, a series of misinterpretations have appeared. To understand the stratigraphic significance of these localities and the geochronological situation of each unit referring to the Pleistocene, a critical historical study of the antecedents was carried out, evaluating the state of each unit. The biostratigraphic studies of the Pampean Region’s mammalian faunas improved the understanding of biogeographic changes taking into account the environmental fluctuations of the Pleistocene.

APA, Harvard, Vancouver, ISO, and other styles

35

Amador, Elmo Da Silva. "Geologia e Geomorfologia da Planície Costeira da Praia do Sul: Ilha Grande - Uma Contribuição à Elaboração do Plano Diretor da Reserva Biológica." Anuário do Instituto de Geociências 11 (January 1, 1987): 35–58. http://dx.doi.org/10.11137/1987_0_35-58.

Full text

Abstract:

Based on stratigraphical, sedimentological and geomorphological methods, a preliminary stratigraphic division is proposed to the Praia do Sul coastal plain, a state Biological Reserve, located in "Ilha Grande", Rio de Janeiro. This reserve was created to preserve the natural ecosystems found therein (sandy coastal plain, mangrove, lagoon, rocky coast and hillside fo rest). The Praia do Sul sedimentation plain is essentially constituted by continental gravels and sands of Upper Pleistocene, marine sandy formations, fluvial-lagoonal sandy-clayer formations and present mangrove swamps and beachs. The paleogeographic evolution of this area can be followed through the sedimentary association that permits to establish the transgressive and regressive process that occured during the Quaternary period.

APA, Harvard, Vancouver, ISO, and other styles

36

Schwarzacher, Walther. "Milankovitch cycles in the pre-Pleistocene stratigraphic record: a review." Geological Society, London, Special Publications 70, no. 1 (1993): 187–94. http://dx.doi.org/10.1144/gsl.sp.1993.070.01.13.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Gibbard, Philip, and Anastasia Markova. "Pleistocene chronostratigraphic subdivisions and stratigraphic boundaries in the mammal record." Quaternary International 160, no. 1 (January 2007): 1–3. http://dx.doi.org/10.1016/j.quaint.2006.10.001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Mikharevich, M. V., and A. V. Shpansky. "PROBLEMS OF AGE AND GENETIC DIAGNOSTICS OF QUATERNARY DEPOSITS IN THE VALLEY OF THE YENISEI RIVER MIDDLE COURSE (YENISEI – LOWER ANGARA STRATIGRAPHIC REGION AND THE MINUSINSK BASINS AREA)." Geology and mineral resources of Siberia, no. 10s (December 2021): 57–68. http://dx.doi.org/10.20403/2078-0575-2021-10c-57-68.

Full text

Abstract:

The article is devoted to the state of stratigraphic exploration maturity of the Eopleistocene – Neo-Рleistocene Quaternary deposits on the boundary of mountain and plain territories in the non-glacial area. The material analysis shows an inadequate rationale of the existing stratigraphic schemes, according to which the ladder of alluvial terraces of these territories was formed sequentially during the Eopleistocene, Neo-Pleistocene and Holocene. The revising of representative sections was carried out, the provision of them with geochronological data, the accuracy of age and genetic diagnostics were evaluated.

APA, Harvard, Vancouver, ISO, and other styles

39

Markin, S. V. "Natural Scientifi c and Archaeological Evidence from the Pleistocene Layers of Kaminnaya Cave." Problems of Archaeology, Ethnography, Anthropology of Siberia and Neighboring Territories 27 (2021): 182–87. http://dx.doi.org/10.17746/2658-6193.2021.27.0182-0187.

Full text

Abstract:

This article discusses the results of a comprehensive study of Pleistocene sediments from Kaminnaya Cave located in mid-elevation erosional middle mountains of the Northwestern Altai, where a variety of material evidence on ancient human environment and culture has been found. The stratigraphic sequences of the site are constituted by loamy deposits often enriched by products of bedrock disintegration. Geomorphology, stratigraphy, biostratigraphy, and chronology of that karst site are discussed on the basis of palaeomagnetic studies, measurements of absolute age, and data on relative position of lithological units. It has been discovered that sedimentation in a considerable part of the cultural-bearing sediments in the cave occurred in the zone of overglacial forest-steppe, overglacial steppe and forest-steppe, and overglacial mountain-forest landscapes. It has been established that during the Sartan period, Kaminnaya Cave was a large habitation camp with complete cycle of lithic reduction and processing. This combination of camp and workshop could only be possible if there were sources of raw materials in the immediate vicinity. The assemblages of the site, belonging to different climatic-stratigraphic subdivisions of the Sartan glaciation, contained stone and bone artefacts from the Final Upper Paleolithic of the region. The petrographic properties of stone inventory and sources of raw materials have been identified, and typological and technological features of the techno-complexes have been analyzed. The toolkits contained a combination of the Upper Paleolithic and archaic types, typical of the Late Upper Paleolithic in Southern Siberia. The conclusion is that a stable cultural tradition of the ancient society was preserved for a considerable period of the Upper Paleolithic in the Northwestern Altai between 28,000 and 10,000 BP.

APA, Harvard, Vancouver, ISO, and other styles

40

Latypova, E. K., and B. L. Yakheemovich. "Geochronology of the Pleistocene and Holocene in the Fore-Urals." Radiocarbon 35, no. 3 (1993): 441–47. http://dx.doi.org/10.1017/s003382220006046x.

Full text

Abstract:

The paper presents the results for the 14C dating obtained recently in the Laboratory of the Institute of Geology, Ufa Science Centre, Russian Academy of Science, on the basis of megafaunal bones, peats, wood and mollusk shells. Dates are reported in stratigraphic sequence from the Late Würmian to the Holocene.

APA, Harvard, Vancouver, ISO, and other styles

41

ALIOTTA, SALVADOR, SILVIA S. GINSBERG, DARÍO GIAGANTE, LAURA G. VECCHI, and MARTA M. SALVATIERRA. "Seismic Stratigraphy of Pleistocene Deltaic Deposits in Bahía Blanca Estuary, Argentina." Anais da Academia Brasileira de Ciências 86, no. 2 (June 2014): 649–62. http://dx.doi.org/10.1590/0001-3765201420130243.

Full text

Abstract:

The Bahía Blanca estuary (Argentina) has a morphological configuration resulting from hydrological and sedimentary processes related to Late Quaternary sea level changes. This estuarine system occupies a large coastal plain with a dense net of tidal channels, low-altitude islands and large intertidal flats. Little is known about the sedimentary units of the marine subbottom. Therefore, a stratigraphical analysis of the northern coast of Bahía Blanca estuary was carried out using high resolution seismic (3.5 kHz) in order to: i) define Quaternary sequences, ii) describe sedimentary structures, and iii) determine the paleoenvironmental conditions of sedimentation. The seismic stratigraphic data collected and their correlation with drilling lithological data show five seismic sequences (S1, S2, S3, S4 and S5), of which S1-S2 were found to be associated with a continental paleoenvironment of Miocene-Pleistocene age. Sequences S3 and S4, whose lithology and seismic facies (paleochannel structures and prograding reflection configurations), were defined on these materials, to evidence the development of an ancient deltaic environment which was part of a large Pleistocene drainage system. The S5 sequence was formed during the Holocene transgressive-regressive process and complete the seismostratigraphic column defined in the present study.

APA, Harvard, Vancouver, ISO, and other styles

42

Lewin, John, Mark G. Macklin, and Jamie C. Woodward. "Late Quaternary Fluvial Sedimentation in the Voidomatis Basin, Epirus, Northwest Greece." Quaternary Research 35, no. 1 (January 1991): 103–15. http://dx.doi.org/10.1016/0033-5894(91)90098-p.

Full text

Abstract:

AbstractDetailed morpho- and lithostratigraphic investigations, allied with radiometric dating, in the Voidomatis basin, Epirus, northwest Greece, have identified four Quaternary terraced alluvial fills that range from middle Pleistocene to historic in age. Major-periods of alluviation during the late Quaternary were associated with valley glaciation (ca. 26,000–20,000 yr B.P.) and subsequent deglaciation (ca. 20,000–15,000 yr B.P.) in the Pindus Mountains during Late Würmian times, and more recently linked to overgrazing sometime before the 11th century AD. The late Quaternary alluvial stratigraphy of the Voidomatis River is more complex than the “Older Fill” and “Younger Fill” model outlined previously, and it is suggested that these terms should no longer form the basis for defining alluvial stratigraphic units in the Mediterranean Basin.

APA, Harvard, Vancouver, ISO, and other styles

43

Bartstra, Gert-Jan. "Sangiran For The Archaeologist A Short Guide For Students." Berkala Arkeologi 10, no. 2 (September 30, 1989): 1–20. http://dx.doi.org/10.30883/jba.v10i2.540.

Full text

Abstract:

To-day the most important locality of Pleistocene hominids in Southeast Asia is Sangiran. This is where Homo erectus fossils come from, to which species the famous Pithecanthropus and Meganthropus belong. Geographically or physiograplhically the area of Sangiran can be described as a basin surrounded by hills, of which the highest summits lie c1bout 180 m above sea level. From a geological point O'f view, however, Sangiran is a dome, where different deposits have been pushed upwards. As a result of subsequent erosion splendid stratigraphic sections are to be found, where Pleistocene and older deposits are exposed.

APA, Harvard, Vancouver, ISO, and other styles

44

Jacobs, Peter M., James C. Knox, and Joseph A. Mason. "Preservation and Recognition of Middle and Early Pleistocene Loess in the Driftless Area, Wisconsin." Quaternary Research 47, no. 2 (March 1997): 147–54. http://dx.doi.org/10.1006/qres.1996.1864.

Full text

Abstract:

An exceptional stratigraphic and pedologic record of Pleistocene environmental conditions occurs at the Kieler Site in the Driftless Area of southwestern Wisconsin. Peoria, Roxana, Loveland, and pre-Loveland loesses overlie weathered bedrock residuum. The pre-Loveland unit previously has been included as part of the residuum at other Driftless Area sites. Early and middle Pleistocene loesses in the Mississippi Valley are normally absent at most localities. Rather than nondeposition, we suggest the apparent absence of pre-Illinoian loess units is due in part to erosion, but also to weathering that renders loesses unrecognizable so they are classified as “residuum.”

APA, Harvard, Vancouver, ISO, and other styles

45

Rahimzadeh, Neda, Tobias Sprafke, Christine Thiel, Birgit Terhorst, and Manfred Frechen. "A comparison of polymineral and K-feldspar post-infrared infrared stimulated luminescence ages of loess from Franconia, southern Germany." E&G Quaternary Science Journal 70, no. 1 (February 8, 2021): 53–71. http://dx.doi.org/10.5194/egqsj-70-53-2021.

Full text

Abstract:

Abstract. Loess-paleosol sequences (LPSs) are essential records for reconstructing Quaternary paleoenvironments. No previous study has provided numerical chronologies of loess in Lower Franconia, southern Germany; their chronostratigraphic assumptions have relied mainly on German (pedo)stratigraphic schemes. In this study, we provide for the first time a chronology for LPSs in Lower Franconia based on optically stimulated luminescence (OSL) dating using quartz and a comparison of K-feldspar (63–100 µm) and the polymineral fraction (4–11 µm). Our results show that all obtained ages are in stratigraphic order, ranging from Holocene to late Pleistocene, and in general confirm the former stratigraphical interpretations. A good agreement of the obtained ages is observed between both feldspar grain size fractions; they also agree well with the quartz OSL ages up to ∼50 ka. However, a marked difference between the growth pattern of the dose response curves and consequently different saturation characteristics of fine and coarse grains is found. Even though in our samples the discrepancy in ages is not very significant, we suggest the use of coarse-grained K-feldspar whenever possible in order to not be confronted with unknowns such as the mineral composition of the polymineral fraction.

APA, Harvard, Vancouver, ISO, and other styles

46

Bonchkovskyi, Оleksandr. "The Kovban` site – a complex loess-soil sequence in the Volyn Upland." Physical Geography and Geomorphology 90, no. 2 (2018): 24–33. http://dx.doi.org/10.17721/phgg.2018.2.02.

Full text

Abstract:

The loess-soil section of Kovban` includes all the stratigraphical units of the Upper Pleistocene, as well as pedosediments and alluvial facies of the Middle Pleistocene pre- and early Dnieper times. On the basis of the field pedolithomorphological description and grain-size analysis, it is proved that the majority of the main stratigraphic units show smaller subdivisions. The Prychernomorsk unit includes two loesses (pc1, pc3) and a Luvisol (pc2). The Dofinivka unit consists of three subunits: two incipient soils are divided by a thin loess subunit (df2). The Bug unit is represented in this section by hillwash and solifluction deposits. The Vytachiv unit is a pedocomplex made up of three well-developed soils, separated by loesses. The soils are a Molic Cambisol (vt3), a Cambisol (vt1b2) and a humic gleysol (vt1b1). The Uday unit consists of two subunits: the lower comprises solifluction deposits, whereas the upper is a loess-like bed. The soil succession of the Pryluky unit is well developed. It consists of three soils – a Molic Cambisol (pl3), a Mollisol (pl1b2) and a sod-podzolic soil (pl1b1). On slopes, the lower soil (pl1b1) is formed on the sands of Tyasmyn unit. The Kaydaky unit is represented by polygenetic sod-podzolic soil. Brown forest soil pedosediments of the last warm period of the Middle Pleistocene overlie Middle Pleistocene alluvial facies. These pedosediments were deformed by syngenetic cryogenic processes and dissected by ground wedges during the Dnieper cryogenic stage. The data obtained indicate that at the end of the Mid Pleistocene, the study area was subjected to uplift that controlled intense river incision and denudation processes. Five phases of cryogenesis have been revealed in the section: dn, ts, pl1b1-b2, ud, bg.

APA, Harvard, Vancouver, ISO, and other styles

47

Berger, Glenn W., Troy L. Péwé, John A. Westgate, and Shari J. Preece. "Age of Sheep Creek Tephra (Pleistocene) in Central Alaska from Thermoluminescence Dating of Bracketing Loess." Quaternary Research 45, no. 3 (May 1996): 263–70. http://dx.doi.org/10.1006/qres.1996.0027.

Full text

Abstract:

AbstractThe age of the Sheep Creek tephra (SCt), a widespread marker ash bed in eastern Alaska and western Yukon Territory, has been ambiguous and controversial. We have obtained three reliable thermoluminescence age estimates from bracketing loess near Fairbanks that imply a deposition age of about 190,000 ± 20,000 yr for SCt. Three of six loess samples near and closely bracketing the SCt beds near Fairbanks yielded younger age estimates (∼117,000 and ∼135,000 yr), most likely (based on field aspects) because of reworking and contamination by translocated grains. The new, reliable age assignment of 190,000 yr confirms independent stratigraphic evidence of a pre-last interglaciation age, and stratigraphic evidence from one site (Upper Eva Creek) that SCt is older than the more-widespread 140,000-yr-old Old Crow tephra. The SCt age also has implications for regional correlations of glacial and nonglacial deposits. In particular, it supports the stratigraphic and geomorphic interpretation that the Delta Glaciation in the east-central Alaska Range and the Reid Glaciation in western Yukon Territory are older than the last interglaciation (isotope substage 5e).

APA, Harvard, Vancouver, ISO, and other styles

48

Jacobs, Peter M., and Anthony T. Davis. "Mineralogical and geochemical evidence of weathering in a middle to late Pleistocene paleosol sequence in the Driftless Area of Wisconsin." Quaternary Research 89, no. 3 (October 26, 2017): 756–68. http://dx.doi.org/10.1017/qua.2017.85.

Full text

Abstract:

AbstractPaleosols occur in the Driftless Area of southwestern Wisconsin because this area escaped direct Pleistocene glaciation, allowing long-term loess and colluvium accumulation in selected settings. The most complete known depositional sequence at Oil City, Wisconsin, contains eight lithologic units with five paleosols, all with normal remanent magnetism (i.e., <780 ka). Previous work characterized the stratigraphy, pedology, micromorphology, and clay mineralogy of the section. We investigate chemical weathering of the 8–63 µm silt fraction using X-ray diffraction (XRD) and elemental geochemistry by portable X-ray fluorescence (pXRF). Elemental ratios TiO2/CaO, Zr/Sr, and Rb/Sr generally align with the pedological evidence of weathering. Mineral ratios plagioclase/quartz and K-feldspar/quartz display greater scatter and less certainty in interpretation. The paleosols with Bt horizons have ratios indicating greater weathering than the modern soil. The most weathered paleosol is formed in the unnamed fourth loess unit stratigraphically below the Loveland Member. The stratigraphic position and higher degree of weathering support correlation of the fourth loess with the Yarmouth Geosol and Crowley’s Ridge Silt of the Middle Mississippi valley. Geochemical indices by pXRF are more consistent with established lithologic breaks than mineralogy by XRD. Our results support the use of pXRF for stratigraphic and weathering studies of Quaternary sediments.

APA, Harvard, Vancouver, ISO, and other styles

49

Elsheikh, Mahmoud. "Seismic Stratigraphic Analysis and Hydrocarbon Potential of Miocene-Quaternary Deposits in the Western Nile Delta Basin." Iraqi Geological Journal 54, no. 2C (September 30, 2021): 1–12. http://dx.doi.org/10.46717/igj.54.2c.1ms-2021-09-20.

Full text

Abstract:

This study focuses on the subsurface Miocene-Pleistocene sedimentary sequence of the Western Delta of Deep-Sea field. Analysis of seismic, based on obtainable well data, and seismic data, allows us to divide the studied successions into two mega sequences: Pre and Post Messinian complexes resulting in transgressive-regressive sedimentation cycles of sea level during the evolution of the Miocene-Pleistocene subsurface sedimentary sequence. The Relative level of the sea was extremely falling in the time of the Messinian period, although it was largely rising at the time of the lower to Middle Pliocene. Pre-Messinian complex encompasses the Miocene strata, while the Post-Messinian complex consists of a thickness pattern of deposits in the time of Pliocene to Pleistocene and ended up with Holocene. The comprehensive study presented here divides these complexes into several orders of sea-level cycles. Pre and Post-Messinian complexes are consisting of several third-order cycles, which is called a depositional sequence, hence the thickness pattern starts from Sidi Salem Formation and ends up with Mit Ghamr Formation (Pleistocene). The interpreted anticline represents a characteristic overlap that can create an appropriate structural trap for hydrocarbons in the sandy intermission of the formations of the Western Deep-Sea Delta field such as Kafr El Sheik siliceous clastic. Besides, the recognized individual and various hidden routes, such as channel and sub-channel in the Pre-Messinian complex are approved for additional inspection to discover hydrocarbons.

APA, Harvard, Vancouver, ISO, and other styles

50

Huscroft, Crystal A., Brent C. Ward, René W. Barendregt, Lionel E. Jackson Jr., and Neil D. Opdyke. "Pleistocene volcanic damming of Yukon River and the maximum age of the Reid Glaciation, west-central Yukon." Canadian Journal of Earth Sciences 41, no. 2 (February 1, 2004): 151–64. http://dx.doi.org/10.1139/e03-098.

Full text

Abstract:

Stratigraphic, paleomagnetic, and radioisotope investigations of the Selkirk Volcanic Group have identified a new eruptive period and constrained the age of the Reid Glaciation, the most extensive middle Pleistocene cordilleran advance recognized in central Yukon. Downstream from Fort Selkirk, a complex of valley-filling compound pahoehoe basalt flows and pillow basalt is exposed for 10 km along the Yukon River and is overlain by outwash deposited during the Reid Glaciation. The flows have an 40Ar/39Ar age of 311 ± 32 ka. This age is consistent with the normal magnetization of the flows and their termination below the level of the contemporary Yukon River flood plain. Taken with the ca. 190 ka Sheep Creek tephra, which overlies Reid drift elsewhere in Yukon Territory, the Reid Glaciation is constrained to oxygen isotope stage 8, not stage 6 as previously thought. The presence of thick foreset-bedded pillow breccia units intercalated with the subaerial flows indicates that this eruption caused damming of the Yukon River. Reevaluation of the stratigraphy of early Pleistocene basalt flows and pillow lavas in the Fort Selkirk area indicates that volcanic damming of the Yukon River has occurred at least once previously.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Stratigraphic Pleistocene'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles