Einloggen

Thematische Bibliographien / Early Mesozoic / Zeitschriftenartikel

Um die anderen Arten von Veröffentlichungen zu diesem Thema anzuzeigen, folgen Sie diesem Link: Early Mesozoic.

Zeitschriftenartikel zum Thema „Early Mesozoic“

Autor: Grafiati

Veröffentlicht am 1. Februar 2025

Geben Sie eine Quelle nach APA, MLA, Chicago, Harvard und anderen Zitierweisen an

Wählen Sie eine Art der Quelle aus:

Machen Sie sich mit Top-50 Zeitschriftenartikel für die Forschung zum Thema "Early Mesozoic" bekannt.

Neben jedem Werk im Literaturverzeichnis ist die Option "Zur Bibliographie hinzufügen" verfügbar. Nutzen Sie sie, wird Ihre bibliographische Angabe des gewählten Werkes nach der nötigen Zitierweise (APA, MLA, Harvard, Chicago, Vancouver usw.) automatisch gestaltet.

Sie können auch den vollen Text der wissenschaftlichen Publikation im PDF-Format herunterladen und eine Online-Annotation der Arbeit lesen, wenn die relevanten Parameter in den Metadaten verfügbar sind.

Sehen Sie die Zeitschriftenartikel für verschiedene Spezialgebieten durch und erstellen Sie Ihre Bibliographie auf korrekte Weise.

1

Ash, Sidney. „The Early Mesozoic Land Flora of the Northern Hemisphere“. Notes for a Short Course: Studies in Geology 15 (1986): 143–61. http://dx.doi.org/10.1017/s027116480000138x.

Der volle Inhalt der Quelle

Annotation:

In this chapter the, early Mesozoic land flora of the northern hemisphere is discussed briefly, and some of the subtle but significant evolutionary changes that took place during the time are summarized. Comments about climatic implications of the fossils are also included as well as comments about the environments of deposition of the fossils. Representative plant megafossils of the Early Mesozoic are illustrated. The Early Mesozoic as used here includes all of the Triassic and Jurassic Periods and the Neocomian Stage of the Cretaceous.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

2

Fensome, R. A., R. A. MacRae, J. M. Moldowan, F. J. R. Taylor und G. L. Williams. „The early Mesozoic radiation of dinoflagellates“. Paleobiology 22, Nr. 3 (1996): 329–38. http://dx.doi.org/10.1017/s0094837300016316.

Der volle Inhalt der Quelle

Annotation:

Dinoflagellates are a major component of the marine microplankton and, from fossil evidence, appear to have been so for the past 200 million years. In contrast, the pre-Triassic record contains only equivocal occurrences of dinoflagellates, despite the fact that comparative ultrastructural and molecular phylogenetic evidence indicates a Precambrian origin for the lineage. Thus, it has often been assumed that the dearth of Paleozoic fossil dinoflagellates was due to a lack of preservation or recognition and that the relatively sudden appearance of dinoflagellates in the Mesozoic is an artifact of the record. However, new evidence from a detailed analysis of the fossil record and from the biogeochemical record indicates that dinoflagellates did indeed undergo a major evolutionary radiation in the early Mesozoic.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

3

Shubin, Neil H., und Hans-Dieter Sues. „Biogeography of early Mesozoic continental tetrapods: patterns and implications“. Paleobiology 17, Nr. 3 (1991): 214–30. http://dx.doi.org/10.1017/s0094837300010575.

Der volle Inhalt der Quelle

Annotation:

The stratigraphic framework for Triassic and Early Jurassic continental strata has greatly changed in recent years. These revised correlations necessitate a review of traditional views of early Mesozoic continental faunal succession and biogeography. We have examined the relationship between tetrapod distribution and paleogeographic context during the Triassic and Early Jurassic on the basis of a data base comprising updated faunal lists for major early Mesozoic assemblages of continental tetrapods. Analysis of these data supports the hypothesis that there were few barriers to biotic interchange among continental tetrapods throughout the Triassic and Early Jurassic. Early Mesozoic tetrapod assemblages are dominated by widely distributed, often cosmopolitan families. Late Triassic patterns of latitudinal variation among tetrapod assemblages appear to be correlated to those seen among terrestrial plants and contrast with the extremely uniform distribution of Early Jurassic continental biotas.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

4

MAKSOUD, SIBELLE, DENISE ISKANDAR-TABIB und DANY AZAR. „Tannoura: A new early Barremian fossiliferous amber outcrop from South Lebanon“. Mesozoic 1, Nr. 1 (28.03.2024): 90–98. http://dx.doi.org/10.11646/mesozoic.1.1.7.

Der volle Inhalt der Quelle

Annotation:

A fossiliferous amber outcrop in Tannoura (Rashayya District, Southern Lebanon) is described. This new discovery constitutes the 30th amber outcrop with biological inclusions in Lebanon and enriches and improves our knowledge about the palaeobiodiversity and palaeoenvironment of the North-Eastern coast of Gondwana during the early Barremian. Also, an infrared spectrum of the amber from Tannoura is given and discussed.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

5

Bown, P. R., M. K. E. Cooper und A. R. Lord. „A Calcareous Nannofossil Biozonation Scheme for the early to mid Mesozoic“. Newsletters on Stratigraphy 20, Nr. 2 (20.12.1988): 91–114. http://dx.doi.org/10.1127/nos/20/1988/91.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

6

DiMichele, William A., Sergius H. Mamay, Dan S. Chaney, Robert W. Hook und W. John Nelson. „An Early Permian flora with Late Permian and Mesozoic affinities from north-central Texas“. Journal of Paleontology 75, Nr. 2 (März 2001): 449–60. http://dx.doi.org/10.1017/s0022336000018230.

Der volle Inhalt der Quelle

Annotation:

Early Permian (late Leonardian Series) plant assemblages from King, Knox, and Stonewall Counties of North-Central Texas are dominated by seed plants, some apparently congeneric with taxa heretofore known only from the Late Permian or the Mesozoic. Conifers are the dominant elements, including one or more species of Ullmannia, Pseudovoltzia liebeana, both known from the Late Permian Zechstein flora of Germany and England, Podozamites sp., characteristic of the Mesozoic, and Walchia sp., abundant in Early Permian floras. Locally common are Taeniopteris cf. eckardtii, a Zechstein species, an unidentified plant represented by pinnulelike laminae with fine parallel veins, similar to pinnules of some Mesozoic cycads, and calamite stems. Rarely encountered are leaf fragments of the Paleozoic ginkgophyte Dicranophyllum, flabellate ginkgophyte leaves, leaves with a broad midvein and narrow, fimbriate lamina, and Wattia, typical of the Early Permian. Associated with these foliar remains are ovulate reproductive structures including the presumed cycad megasporophyll Dioonitocarpidium, known only from the Mesozoic, a voltzialean cone scale similar to Swedenborgia, and a variety of seeds, some remarkably similar to Agathis, of Cretaceous age. The assemblage includes only rare scraps of foliage and seeds possibly attributable to the pteridophyllous elements (gigantopterids, callipterids, and ferns) that dominate the Permian. The fossil plants occur in multistorey, fining-upwards, tidal-channel deposits that also include pelecypods and fragmentary palaeoniscoid fish. The occurrence of derived lineages in xeric habitats during the Early Permian indicates that some supposed Mesozoic groups actually preceded and survived the end-Permian extinction, reappearing in basinal lowlands during the mid-Mesozoic.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

7

Rowe, Timothy. „The Early History of Theropods“. Short Courses in Paleontology 2 (1989): 100–112. http://dx.doi.org/10.1017/s2475263000000891.

Der volle Inhalt der Quelle

Annotation:

Theropods have traditionally been portrayed as extinct bipedal predators built along the lines of such celebrated terrors as Tyrannosaurus, Deinonychus, and Allosaurus. The earliest theropods indeed fit that image, and all of them are decidedly extinct. However, it has become increasingly apparent that living birds trace their genealogy to those extinct theropods (Ostrom, 1976; Gauthier, 1986; Gauthier and Padian, 1985 and this volume), and that any adequate consideration of the evolutionary history of Theropoda must assess the lineage as a whole, instead of arbitrarily focusing on the Mesozoic forms alone. When the approximately 8,600 living avian descendants of the ancestral theropod are taken into account, together with the various extinct Mesozoic and Cenozoic taxa, theropods display a far greater range of size, form, behavior, and diet than we ever pictured in our traditional image.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

8

Pavliuk, M., und A. Medvedev. „PANCARDI MAGMATISM AND STRUCTURE IN EARLY MESOZOIC“. Visnyk of Taras Shevchenko National University of Kyiv. Geology, Nr. 66 (2014): 27–33. http://dx.doi.org/10.17721/1728-2713.66.04.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

9

Suh, Alexander, Claudia C. Weber, Christian Kehlmaier, Edward L. Braun, Richard E. Green, Uwe Fritz, David A. Ray und Hans Ellegren. „Early Mesozoic Coexistence of Amniotes and Hepadnaviridae“. PLoS Genetics 10, Nr. 12 (11.12.2014): e1004559. http://dx.doi.org/10.1371/journal.pgen.1004559.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

10

Zhou, Zuyi, Qiuyuan Lao, Huanjiang Chen, Sijiang Ding und Zhongting Liao. „Early Mesozoic orogeny in Fujian, southeast China“. Geological Society, London, Special Publications 106, Nr. 1 (1996): 549–56. http://dx.doi.org/10.1144/gsl.sp.1996.106.01.35.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

11

Gilissen, Emmanuel, und Thierry Smith. „Mesozoic mammals and early mammalian brain diversity“. Behavioral and Brain Sciences 26, Nr. 5 (Oktober 2003): 556–57. http://dx.doi.org/10.1017/s0140525x0326012x.

Der volle Inhalt der Quelle

Annotation:

Fossil remains witness the relationship between the appearance of the middle ear and the expansion of the brain in early mammals. Nevertheless, the lack of detachment of ear ossicles in the mammaliaform Morganucodon, despite brain enlargement, points to other factors that triggered brain expansion in early mammals. Moreover, brain expansion in some early mammalian groups seems to have favored brain regions other than the cortex.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

12

CHEN, MENG-YU, AO-WEI XIE, MIN XU, HAO WU und NING TIAN. „Occurrence of Early Cretaceous Shimakuroxylon wood in southeastern China, and its palaeobiogeographic significance“. Mesozoic 1, Nr. 2 (27.06.2024): 186–91. http://dx.doi.org/10.11646/mesozoic.1.2.10.

Der volle Inhalt der Quelle

Annotation:

The Mesozoic gymnosperm genus Shimakuroxylon Philippe, Boura, Oh et Pons is a peculiar petrified wood taxon which was exclusively recorded from the Jurassic–Early Cretaceous interval in eastern Asia. To date, ten occurrences of this genus were documented in Japan, Indochina and Tibet (southwestern China). However, little is known about the record of Shimakuroxylon in eastern China. Here, we describe a new fossil wood specimen from the Lower Cretaceous Laocun Formation in Longyou County of Quzhou City, Zhejiang Province, southeastern China. This fossil specimen exhibits typical Shimakuroxylon anatomy with japonicum-type (shimakurean) radial tracheid pitting and araucarioid cross-field pitting, representing a new record of Shimakuroxylon in eastern Asia. This new finding contributes to our understanding of the fossil wood diversity of the Early Cretaceous xyloflora in southern China, and provides additional data that furthers our knowledge of the palaeobiogeographical distribution of Shimakuroxylon. Shimakuroxylon is commonly suggested as an indicator of warm and wet climates based on its palaeobiogeographical distribution pattern. However, evidence from plant megafossils and sporopollen suggests the local climate of the study area was warm and arid to semiarid during the Early Cretaceous. It is tentatively suggested that the wood plant might have lived in a warm and humid basin margin with relatively sufficient water supply, though the general environmental background might have been arid to semiarid.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

13

GAO, HAI-LONG, YI-TONG SU, CHEN-YANG CAI, DANY AZAR, XIANG-BO SONG, XIN-NENG LIAN und DI-YING HUANG. „Discussion on the age of the Early Cretaceous amber from the Hailar Basin, NE China“. Mesozoic 1, Nr. 2 (27.06.2024): 192–207. http://dx.doi.org/10.11646/mesozoic.1.2.11.

Der volle Inhalt der Quelle

Annotation:

Amber in China is predominantly found from the Cenozoic era, with the oldest-known amber originating from the Middle Triassic Qingyan biota in Guiyang, Guizhou. Chinese Cretaceous amber has been known from Xixia and Neixiang (Henan Province), Guangzhou (Guangdong Province), and the Buir Lake area (Inner Mongolia). Some previous studies have suggested that the amber found at the base of the Yimin Formation in the Yimin Coal Mine in the Hailar Basin (130.9 ± 2.8 Ma, as constrained by detrital zircon U-Pb dating in the original paper) represents the oldest known amber in China at that time. In this paper, detrital zircon U-Pb dating was conducted on the clastic rocks from the Damoguaihe Formation of the Zhalainuoer Coal Mine, Hailar Basin to contest the age of the Buir Lake amber. Our results suggest that the upper part of the Damoguaihe Formation was deposited earlier than 116 Ma (late Aptian), consistent with biostratigraphy and isotopic chronology. Therefore, the age of the amber-bearing Damoguaihe Formation in Hailar Basin should be slightly older than 116 Ma. Amber from the Yimin Formation was discovered from two layers, with the lower layer (the first coal seam) likely near the Aptian–Albian boundary and the upper layer slightly later than 111.7 Ma. Our analyses further confirm that Buir Lake ambers are from the upper Lower Cretaceous Damoguaihe Formation and Yimin Formation, dating to the Aptian–Albian.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

14

SONG, XIANG-BO, ZI-XI WANG, TAO SU, CHONG DONG und DI-YING HUANG. „First fruit record of Pterocarya (Juglandaceae) from the upper Eocene of the central Qinghai-Tibetan Plateau, China“. Mesozoic 1, Nr. 3 (26.09.2024): 288–97. http://dx.doi.org/10.11646/mesozoic.1.3.9.

Der volle Inhalt der Quelle

Annotation:

The Juglandaceae family experienced significant diversification during the early Tertiary, as evidenced by fossil records showing a broad expansion of both extant and extinct taxa. The genus Pterocarya is characterized by its distinctive fruit with butterfly-shaped wings and a small nutlet. Macrofossil records suggest that this genus was distributed widely in the Northern Hemisphere. However, the fossil record of Pterocarya in China is limited. In this study, we describe a well-preserved Pterocarya fossil winged fruit from the middle-upper member of the Niubao Formation (the upper Eocene) of the central Qinghai-Tibetan Plateau, China. The winged fruit is identified as Pterocarya liae sp. nov. based on detailed morphological comparison, representing the earliest known record of Pterocarya winged fruit in Asia. The new finding extends the paleobiogeographic distribution of Pterocarya during the Eocene and provides new insights into the early stage of the diversification of this genus.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

15

Litwin, Ronald J., und Sidney R. Ash. „First early Mesozoic amber in the Western Hemisphere“. Geology 19, Nr. 3 (1991): 273. http://dx.doi.org/10.1130/0091-7613(1991)019<0273:femait>2.3.co;2.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

16

Delsett, Lene Liebe, und Nicholas D. Pyenson. „Early and fast rise of Mesozoic ocean giants“. Science 374, Nr. 6575 (24.12.2021): 1554–55. http://dx.doi.org/10.1126/science.abm3751.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

17

Avé Lallemant, Hans G., und John S. Oldow. „Early Mesozoic southward migration of Cordilleran Transpressional Terranes“. Tectonics 7, Nr. 5 (Oktober 1988): 1057–75. http://dx.doi.org/10.1029/tc007i005p01057.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

18

Jiao, Wenjun, Yong-Xiang Li, Zhenyu Yang und Jiarun Liu. „A Widespread Early Mesozoic Remagnetization in South China“. Journal of Geophysical Research: Solid Earth 124, Nr. 1 (Januar 2019): 88–103. http://dx.doi.org/10.1029/2018jb016707.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

19

Livermore, R. A., A. G. Smith und F. J. Vine. „Late Palaeozoic to early Mesozoic evolution of Pangaea“. Nature 322, Nr. 6075 (Juli 1986): 162–65. http://dx.doi.org/10.1038/322162a0.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

20

Lingham‐Soliar, Theagarten, und Tim Broderick. „An enigmatic early mesozoic dinosaur trackway from Zimbabwe“. Ichnos 7, Nr. 2 (August 2000): 135–48. http://dx.doi.org/10.1080/10420940009380152.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

21

Fraser, Nicholas C. „Early Mesozoic Terrestrial Ecosystems: Faunal Changes Among Vertebrates“. Paleontological Society Papers 6 (November 2000): 115–40. http://dx.doi.org/10.1017/s1089332600000735.

Der volle Inhalt der Quelle

Annotation:

The past decade has seen many advances in research on vertebrate faunas of the Triassic period. The end of the Triassic now is cited widely as the dawn of modern terrestrial ecosystems, and currently the earliest mammals, turtles, lissamphibians (frogs, toads and salamanders), lizards, and crocodiles are all documented from this period. Admittedly many of these early members of present day higher order taxa were very different from their modern counterparts. For instance, the earliest crocodiles were highly active cursorial forms (e.g., Crush, 1984), and the mammals were very different to the living placentals and marsupials. Nevertheless, they possessed many of the key morphological characteristics that diagnose the group and that may well have contributed to their ultimate success. However, the Triassic was also a time of bizarre and enigmatic tetrapods, some of whose relationships are the subject of considerable debate. Indeed, in the last year this debate has reached new heights with suggestions that certain rather unusual Triassic non-dinosaurian tetrapods may have more bearing on bird origins than theropod dinosaurs. This debate has been fueled by the discoveries of feathered dinosaurs from China which, on the face of it, one might expect to dampen the search for alternative hypotheses regarding bird origins.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

22

Buslov, M. M., Y. Fujiwara, K. Iwata und N. N. Semakov. „Late Paleozoic-Early Mesozoic Geodynamics of Central Asia“. Gondwana Research 7, Nr. 3 (Juli 2004): 791–808. http://dx.doi.org/10.1016/s1342-937x(05)71064-9.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

23

Harun, Zaiton. „Late Mesozoic-Early Tertiary Faults of Peninsular Malaysia“. Bulletin of the Geological Society of Malaysia 45 (01.05.2002): 117–22. http://dx.doi.org/10.7186/bgsm45200217.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

24

Sirenko, Olena A., und Olena A. Shevchuk. „Levels of changes in the genus Pinus Linné in the composition of Mesozoic and Cenozoic flora and vegetation as an additional criterion for the division of sediments by the Mesozoic and Cenozoic of Ukraine“. Journal of Geology, Geography and Geoecology 30, Nr. 4 (27.12.2021): 741–53. http://dx.doi.org/10.15421/112168.

Der volle Inhalt der Quelle

Annotation:

The article presents an analysis of a large array of results of palynological studies of Mesozoic and Cenozoic sediments of Ukraine and adjacent regions of Belarus and Russia. Numerous literature data on the palynological characteristics of Meso-Cenozoic sediments and the materials of the authors are summarized according to the results of spore-pollen analysis of Mesozoic and Cenozoic sediments within the main tectonic structures of Ukraine. It has been established that the genus Pinus (Pinaceae) is an integral part of the Meso-Cenozoic flora of Ukraine. Although, the participation in the flora and vegetation of the genus Pinus and its species diversity in different periods of geological time were different. Despite the long history and significant achievements of palynological research of Meso-Cenozoic sediments of Ukraine, no attention has been paid to the historical aspect of Pinus development in the Meso-Cenozoic flora. This work is presented as the first stem to fill this gap. The genus Pinus has a large stratigraphic range, but its species diversity and quantitative changes in the composition of Mesozoic and Cenozoic flora of different ages are markedly different. The analysis of these changes made it possible to trace the emergence and main levels at which the species composition was renewed and the role of Pinus in flora increased during the Mesozoic and Cenozoic. According to the results of the research, 5 levels of increasing the participation of the genus Pinus and changes in its species affiliation in the Mesozoic flora were established: Aalenian period of the Middle Jurassic (appearance of the first representatives of Pinus); Oxfordian time of the Late Jurassic; Valanginian – Early Barremian times of the Early Cretaceous; Albian time of the Early Cretaceous; Late Campanian time of the Late Cretaceous. 5 levels of increasing the role of Pinus and its species diversity for the flora and vegetation of the Cenozoic were also established: Oligocene time of the Paleogene, Konkian-early Sarmatian time of the Middle Miocene; early Pontian (Ivankov) time of the Late Miocene; early Kimmerian time (early Sevastopol) of the Early Pliocene and Martonosha time of the Early Neopleistocene. Certain levels have been traced for the similar age of Cenozoic flora of Belarus and Russia.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

25

Antipin, V. S., A. B. Perepelov und D. Odgerel. „Rare-metal granites from various zones of the early mesozoic magmatic areal (Mongolia): geochemical and petrogenetic features“. Доклады Академии наук 485, Nr. 3 (21.05.2019): 335–40. http://dx.doi.org/10.31857/s0869-56524853335-340.

Der volle Inhalt der Quelle

Annotation:

This study is aimed at comparative analysis of the chemical evolution, age, and petrogenetic features of the Li–F granites from various zones of the Early Mesozoic magmatic areal. The newly obtained geochemical data preclude the formation of rare-metal Li–F granites by processes of magmatic differentiation of a palingenic granitic magma, parental to the Baga–Khentei Pluton. The rare-metal granites of the peripheral zone of the Early Mesozoic magmatic areal, compared to their counterparts from the central part (the Baga–Khentei Pluton), are more enriched in some elements that accumulated intensively during fluid-magmatic differentiation (Li, Rb, Sn, Ta, and F), often forming a concentrated mineralization. This corroborates the potential of rifted fringes of batholiths in the context of the connection of rare-metal mineralization and magmatism. The geochemical specifics of the Khentei intrusion granite from the central part of the Early Mesozoic magmatic areal may imply a deeper source related to the mantle plume.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

26

NEL, ANDRÉ, YE-HAO WANG und DI-YING HUANG. „The third mesomegaloprepid damselfly from the mid-Cretaceous Kachin amber (Odonata: Zygoptera)“. Mesozoic 1, Nr. 3 (26.09.2024): 283–87. http://dx.doi.org/10.11646/mesozoic.1.3.8.

Der volle Inhalt der Quelle

Annotation:

Mesomegaloprepus liea sp. nov., the third species of the family Mesomegaloprepidae, is described from mid-Cretaceous Kachin amber. To date, this family is only known from the Cretaceous Burma paleo-island (also referred to as the Burmese terrane), although it probably originated in the Gondwana continent during the early Cretaceous. It possibly knew a phenomenon of endemism diversification.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

27

Butler, Richard J., Randall B. Irmis und Max C. Langer. „Preface to ‘Late Triassic Terrestrial Biotas and the Rise of Dinosaurs’ Special Issue“. Earth and Environmental Science Transactions of the Royal Society of Edinburgh 101, Nr. 3-4 (September 2010): v—ix. http://dx.doi.org/10.1017/s1755691011020135.

Der volle Inhalt der Quelle

Annotation:

The early Mesozoic records an important transition in the history of the Earth’s terrestrial ecosystems. As they recovered from the largest known mass extinction (the end-Permian event), organisms in these ecosystems transitioned to new forms that eventually evolved into the classic Mesozoic biotas, and laid the foundations for many groups still flourishing today (Fraser 2006; Irmis & Whiteside 2010; Sues & Fraser 2010). All of this was set against a backdrop of dynamic climatic and physical events that shaped these biotas. This early Mesozoic terrestrial transition reached its culmination in many ways during the Late Triassic, when ecosystems had largely recovered from the end-Permian extinction, but had not yet been affected by the end-Triassic mass extinction (Fraser & Sues this volume). Thus, we see a combination of taxa, with some groups that would not survive the end of the Triassic living alongside early representatives of lineages that flourished later in the Mesozoic (e.g., Fraser 2006; Irmis et al. 2007; Brusatte et al. 2008; Sues & Fraser 2010, this volume) and in some cases are still diverse today. Just one example of this transition, recorded during the Late Triassic, is the origin and diversification of non-avian dinosaurs, the iconic representatives of Mesozoic terrestrial ecosystems (Brusatte et al. 2010; Langer et al. 2010). Although small and rare components of their respective biotas when they first evolved ∼231 Ma, dinosaurs were abundant and had a near-worldwide distribution by the beginning of the Jurassic Period (∼201·3 Ma).

APA, Harvard, Vancouver, ISO und andere Zitierweisen

28

Stanley, George D. „Early Mesozoic carbonate rocks of the Pucará Group in Northern and Central Peru“. Palaeontographica Abteilung A 233, Nr. 1-6 (22.11.1994): 1–32. http://dx.doi.org/10.1127/pala/233/1994/1.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

29

GAO, HAI-LONG, YONG ZHANG, YI-TONG SU, LIN-WEI SHEN, HUAN-YU LIAO, XIAO-MEI NIE und DI-YING HUANG. „Newly identified late Early Cretaceous volcanic rocks in the Beixiangshan area, Lower Yangtze River Belt, South China and its implications“. Mesozoic 1, Nr. 2 (27.06.2024): 159–72. http://dx.doi.org/10.11646/mesozoic.1.2.8.

Der volle Inhalt der Quelle

Annotation:

The magmatic events in the Lower Yangtze River Belt could be divided into four stages: 148–133 Ma, 131–127 Ma, 127–121 Ma, and 109–100 Ma. The final episode is represented by the intrusions in the Ningzhen area, however no contemporaneous volcanic rocks have been reported. In this study, we present an integrated analysis of petrology, zircon U-Pb ages, and whole rock major-trace elements for newly identified volcanic rocks in the Beixiangshan area. Zircon U-Pb dating yields an eruption age of 106.3 ± 0.4 Ma, indicating that these rocks likely belong to the lower part of the Pukou Formation. The volcanic rocks exhibit arc-like geochemical features, distinct from those of the intrusions in the Ningzhen area. The volcanic rocks may be formed during a tectonic transition phase from compression to extension, due to the direction changes of plate convergence. The widespread angular unconformity around the volcanic rocks may represent episode C of the Yanshanian tectonic event, based on the dating work on volcanic rocks, its minimum age should be ca. 106 Ma.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

30

Hautmann, M., und M. Golej. „Terquemia (Dentiterquemia) eudesdeslongchampsinew subgenus and species, an interesting cementing bivalve from the Lower Jurassic of the western Carpathians (Slovakia)“. Journal of Paleontology 78, Nr. 6 (November 2004): 1086–90. http://dx.doi.org/10.1017/s0022336000043894.

Der volle Inhalt der Quelle

Annotation:

Based on well-preserved material from the Sinemurian of the western Carpathians, the new subgenusTerquemia (Dentiterquemia) is proposed, which is presently represented only by its type speciesT. (Dentiterquemia) eudesdeslongchampsin. sp.Dentiterquemiais separated fromTerquemiasensu stricto by a series of denticles along the hinge margin and corresponding, chevronlike ridges on the ligament area. The combination of hinge teeth with a cementing habit is interpreted as a defense strategy inhibiting torsion of the valves as well as manipulation of the animal as a whole. Whereas different kinds of articulating hinge structures evolved independently in several clades of early Mesozoic cementing bivalves, Paleozoic cementing bivalves generally lack such structures. It is proposed that this difference reflects an early Mesozoic proliferation of durophagous predators and therefore points to a beginning of the “Mesozoic marine revolution” soon after the end-Permian mass extinction.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

31

Graversen, Ole. „Structural analysis of superposed fault systems of the Bornholm horst block, Tornquist Zone, Denmark.“ Bulletin of the Geological Society of Denmark 57 (15.11.2009): 25–49. http://dx.doi.org/10.37570/bgsd-2009-57-02.

Der volle Inhalt der Quelle

Annotation:

The Bornholm horst block is composed of Precambrian crystalline basement overlain by Palaeozoic and Mesozoic cover rocks. The cover intervals are separated by an angular unconformity and a hiatus spanning the Devonian through Middle Triassic interval. Late Palaeozoic faulting of the Early Palaeozoic Baltica platform is correlated with early-middle Carboniferous deformation in the Variscan foreland and with faulting associated with dolerite dyke injection in Skåne in the Late Carboniferous – Early Permian. The Palaeozoic fault systems are striking NW-SE and WNW-ESE and the platform series are dipping towards the SE and ESE respectively. The Mesozoic faulting was associated with the development of a horst-graben framework in the Bornholm-Skåne segment of the Sorgenfrei-Tornquist Zone. Mesozoic fault subsidence started in the Rønne Graben in the Triassic. In the Jurassic the Arnager-Sose block became active, cut off from the Bornholm block; in addition the Læså Graben (new) and the Øle Å fault block complex (new) were cut into the central Bornholm block from the south. In the Late Cretaceous the central Bornholm block was perforated by isolated fault blocks, i.e. the Nyker block, the Bøsthøj block and the Lobbæk block (new) along with subsidence of the Holsterhus block and renewed subsidence of the Arnager-Sose block. The Mesozoic series are dipping towards the southwest. The Palaeozoic fault systems were associated with two-dimensional plane strain during ENE-WSW and NNE-SSW extension. By contrast the Jurassic and Cretaceous fault systems were associated with three-dimensional strain with maximum extension striking NE-SW and secondary extension striking NW-SE. The Mesozoic palaeostress fields were associated with the break down of the Pangea supercontinent.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

32

Curry Rogers, Kristina, Ricardo N. Martínez, Carina Colombi, Raymond R. Rogers und Oscar Alcober. „Osteohistological insight into the growth dynamics of early dinosaurs and their contemporaries“. PLOS ONE 19, Nr. 4 (03.04.2024): e0298242. http://dx.doi.org/10.1371/journal.pone.0298242.

Der volle Inhalt der Quelle

Annotation:

Dinosauria debuted on Earth’s stage in the aftermath of the Permo-Triassic Mass Extinction Event, and survived two other Triassic extinction intervals to eventually dominate terrestrial ecosystems. More than 231 million years ago, in the Upper Triassic Ischigualasto Formation of west-central Argentina, dinosaurs were just getting warmed up. At this time, dinosaurs represented a minor fraction of ecosystem diversity. Members of other tetrapod clades, including synapsids and pseudosuchians, shared convergently evolved features related to locomotion, feeding, respiration, and metabolism and could have risen to later dominance. However, it was Dinosauria that radiated in the later Mesozoic most significantly in terms of body size, diversity, and global distribution. Elevated growth rates are one of the adaptations that set later Mesozoic dinosaurs apart, particularly from their contemporary crocodilian and mammalian compatriots. When did the elevated growth rates of dinosaurs first evolve? How did the growth strategies of the earliest known dinosaurs compare with those of other tetrapods in their ecosystems? We studied femoral bone histology of an array of early dinosaurs alongside that of non-dinosaurian contemporaries from the Ischigualasto Formation in order to test whether the oldest known dinosaurs exhibited novel growth strategies. Our results indicate that the Ischigualasto vertebrate fauna collectively exhibits relatively high growth rates. Dinosaurs are among the fastest growing taxa in the sample, but they occupied this niche alongside crocodylomorphs, archosauriformes, and large-bodied pseudosuchians. Interestingly, these dinosaurs grew at least as quickly, but more continuously than sauropodomorph and theropod dinosaurs of the later Mesozoic. These data suggest that, while elevated growth rates were ancestral for Dinosauria and likely played a significant role in dinosaurs’ ascent within Mesozoic ecosystems, they did not set them apart from their contemporaries.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

33

Wang, Ping Li, Da Wei Lv, Hai Yan Liu, Xue Zheng und Yu Lin Lv. „Migration Law of Mesozoic Qaidam Basin Depocenters“. Advanced Materials Research 524-527 (Mai 2012): 63–66. http://dx.doi.org/10.4028/www.scientific.net/amr.524-527.63.

Der volle Inhalt der Quelle

Annotation:

According to stratigraphy and distribution features of the Qaidam Basin, and further the formation and migration of it’s depocenters, it is considered that the Middle-Upper Triassic were mainly sags scattered among the Qilian Mountains, the Alabasitao Mountains and the Kunlun Mountains; the Early Jurassic depocenters were located mainly in Lenghu depression and Yiliping sag at the northwest of the basin; several Middle Jurassic depocenters distributed from the northwest to the southeast of the basin along Sertengshan-Yuqia near front of the Qilian mountains; the Late Jurassic-Cretaceous depocenters moved east and south. The basin had been larger since the Middle Jurassic, and the sedimentary facies changed from semideep-deep lacustrine of the Early-Middle Jurassic to near-source variegated fluvial-lacustrine of the Late Jurassic and brownish red lakeshore of the Early Cretaceous.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

34

Ignatov, Michael S., Tatyana V. Voronkova, Ulyana N. Spirina und Svetlana V. Polevova. „How to Recognize Mosses from Extant Groups among Paleozoic and Mesozoic Fossils“. Diversity 16, Nr. 10 (08.10.2024): 622. http://dx.doi.org/10.3390/d16100622.

Der volle Inhalt der Quelle

Annotation:

This paper describes a range of Paleozoic and Mesozoic mosses and assesses how far they can be referred to extant taxa at the family, ordinal, or class levels. The present study provides new data on Paleozoic mosses of the order Protosphagnales, re-evaluating affinities of some groups previously thought to be unrelated. The leaf areolation pattern, combined with the leaf costa anatomy, results in the subdivision of Protosphagnales into five separate families: Protosphagnaceae (at least six genera), Polyssaieviaceae (at least three genera), and three monogeneric families: Rhizonigeritaceae, Palaeosphagnaceae, and Servicktiaceae. We urge caution in referring Paleozoic and Early Mesozoic fossil mosses as members of Dicranidae and Bryidae, as they may belong to the extinct moss order Protosphagnales. Additional evidence supports the relation of the Permian genus Arvildia to extant Andreaeopsida. We segregate Late Palaeozoic and Early Mesozoic mosses that are superficially similar to extant members of either Dicranales or Polytrichales, into the artificial informal group of Archaeodicranids, distinguishing them from ecostate Paleozoic and Mesozoic mosses, which are combined here into another artificial informal group, Bryokhutuliinids. The latter includes the genus Bryokhutuliinia, widespread in contemporary Asia, from the Middle Jurassic to the Lower Cretaceous, as well as other superficially similar ecostate plants from different regions worldwide, ranging from the Upper Palaeozoic to the Lower Cretaceous. A list of Paleozoic, Mesozoic, and Eocene moss fossils suitable for age calibration in phylogenetic trees is provided.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

35

Roca, E., J. Guimerà und R. Salas. „Mesozoic extensional tectonics in the southeast Iberian Chain“. Geological Magazine 131, Nr. 2 (März 1994): 155–68. http://dx.doi.org/10.1017/s0016756800010694.

Der volle Inhalt der Quelle

Annotation:

AbstractThe Desert de les Palmes area, in the southeast Iberian Chain, belongs to a Mesozoic NE–SW high which separated the early Cretaceous basins of the Maestrat and Aliaga-Penyagolosa from the little Orpesa basin. Its structure is characterized by the development of a system of NE–SW to ENE–WSW extensional listric faults detached in a shallow upper crustal level (1.7–2.2 km), mostly affecting the pre-Upper Cretaceous rocks. These faults record two well-differentiated rifting periods: (1) a first late Triassic–early Jurassic rifting period that divided the Desert de les Palmes high in several blocks; (2) a second early Cretaceous rifting period, only developed in the eastern margin of the Desert de les Palmes high, which was related to the opening of the Maestrat, Aliaga-Penyagolosa and Orpesa basins. Based on the comparison of the main features of this Mesozoic structure with an analysis of the structural and subsidence data already known in the neighbouring Mesozoic basins (Maestrat, Aliaga-Penyagolosa and Columbrets), a geodynamic scenario for the crustal evolution of the eastern Iberian Chain is also suggested. This involves four evolutionary stages: (1) Triassic rift (late Permian–Hettangian); (2) early and middle Jurassic postrift (Sinemurian–Oxfordian); (3) late Jurassic and early Cretaceous rift (Kimmeridgian–middle Albian), which includes a short Hauterivian postrift period; and (4) late Cretaceous postrift (late Albian–Maastrichtian).

APA, Harvard, Vancouver, ISO und andere Zitierweisen

36

Gordienko, I. V., R. A. Badmatsyrenova, V. S. Lantseva und A. L. Elbaev. „Selenga ore district in Western Transbaikalia: structural and mineragenetic zoning, genetic types of deposits and geodynamic settings of ore localization“. Геология рудных месторождений 61, Nr. 5 (18.11.2019): 3–36. http://dx.doi.org/10.31857/s0016-77706153-36.

Der volle Inhalt der Quelle

Annotation:

Based on complex structural, geological, and mineragenetic metallogenic studies, taking into account the results of earlier subject-specific, prospecting, mapping, and exploration works, it has been established that Upper Paleozoic and Early Mesozoic tectono-magmatic structures are widely developed within the ore district. They are associated with the development of the transregional Upper Paleozoic Selenga-Vitim volcano-plutonic belt of riftogenic type as well as with the formation of the Early Mesozoic Western Transbaikalian zone of intraplate magmatism. The main commercially important mineral raw material resources of the Selenga ore district which are located in the ore clusters (the Kunaley, Kizhinga, Cheremshanka-Oshurkovo, Tashir etal.) and beyond their bounds are associated with the Late Paleozoic-Mesozoic magmatic activity. It is shown that molybdenum and beryllium are the main ore mineral resources within the investigated ore district which establish its mineragenetic features. The new material characteristics of the Upper Paleozoic and Early Mesozoic intraplate magmatic complexes and the associated deposits of mineral raw materials (Mo, Be, Ti, quartz, fluorite and apatite raw materials) and other promising ore objects of gold, uranium and rare-earth-barium-strontium mineralization are obtained. The geodynamic conditions of their formation and the main age boundaries of the ore-forming processes are revealed, the prospects of mining in the Selenga ore district and the involvement of this ore potential in the program of the regions economic modernization are estimated.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

37

Milnes, AR, RP Bourman und KH Northcote. „Field relationships of ferricretes and weathered zones in southern South Australia: a contribution to 'laterite' studies in Australia“. Soil Research 23, Nr. 4 (1985): 441. http://dx.doi.org/10.1071/sr9850441.

Der volle Inhalt der Quelle

Annotation:

Terrestrial landscapes have existed in parts of southern South Australia since the Carboniferous to Permian Gondwanaland glaciation. Widespread weathered zones and ferricrete horizons and crusts on present highland surfaces in the region have been ascribed by various workers to Mesozoic or early Tertiary weathering phases. A critical examination of field relationships, however, points instead to complex reworking and continuous weathering of relic landscapes since early Mesozoic times, leading to the intricate patterns of sediments and soils forming the present regolith. Ferricrete crusts sporadically distributed on the highland surfaces are interpreted dominantly as remnants of iron-impregnated sediments of ancient valleys or depressions. The great but variable thickness of kaolinized bedrock beneath the highland surfaces, regarded by other workers as the mottled and pallid zones of a 'laterite' profile, is the integrated product of leaching and weathering throughout the Mesozoic and Cainozoic and cannot be assigned to separate and distinct climatic events. The use of weathered landsurfaces and ferricretes as morphostratigraphic markers in such landscapes is questionable.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

38

Archer, Michael, Timothy F. Flannery, Alex Ritchie und R. E. Molnar. „First Mesozoic mammal from Australia—an early Cretaceous monotreme“. Nature 318, Nr. 6044 (November 1985): 363–66. http://dx.doi.org/10.1038/318363a0.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

39

Cai, Chen-Yang, Margaret K. Thayer, Michael S. Engel, Alfred F. Newton, Jaime Ortega-Blanco, Bo Wang, Xiang-Dong Wang und Di-Ying Huang. „Early origin of parental care in Mesozoic carrion beetles“. Proceedings of the National Academy of Sciences 111, Nr. 39 (15.09.2014): 14170–74. http://dx.doi.org/10.1073/pnas.1412280111.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

40

Reisz, Robert R., und Hans-Dieter Sues. „Herbivory in Late Paleozoic and Early Mesozoic Amniote Tetrapods“. Paleontological Society Special Publications 8 (1996): 323. http://dx.doi.org/10.1017/s2475262200003257.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

41

Murray, A. M. „The Palaeozoic, Mesozoic and Early Cenozoic fishes of Africa“. Fish and Fisheries 1, Nr. 2 (Juni 2000): 111–45. http://dx.doi.org/10.1046/j.1467-2979.2000.00015.x.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

42

Lee, Michael S. Y. „In the shadow of the Dinosaurs: Early mesozoic tetrapods“. Trends in Ecology & Evolution 10, Nr. 9 (September 1995): 383. http://dx.doi.org/10.1016/s0169-5347(00)89143-0.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

43

Hart, Malcolm B., Melissa J. Oxford und Wendy Hudson. „The early evolution and palaeobiogeography of Mesozoic planktonic foraminifera“. Geological Society, London, Special Publications 194, Nr. 1 (2002): 115–25. http://dx.doi.org/10.1144/gsl.sp.2002.194.01.09.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

44

Rowe, Timothy. „In the shadow of the dinosaurs–early Mesozoic Tetrapods“. Journal of Vertebrate Paleontology 15, Nr. 4 (27.12.1995): 866–67. http://dx.doi.org/10.1080/02724634.1995.10011272.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

45

Bosworth, William. „Mesozoic and early Tertiary rift tectonics in East Africa“. Tectonophysics 209, Nr. 1-4 (August 1992): 115–37. http://dx.doi.org/10.1016/0040-1951(92)90014-w.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

46

Hou, Quanlin, Qing Liu, Hongyuan Zhang, Xiaohui Zhang und Jun Li. „The Mesozoic Tectonic Dynamics and Chronology in the Eastern North China Block“. Journal of Geological Research 2012 (07.08.2012): 1–11. http://dx.doi.org/10.1155/2012/291467.

Der volle Inhalt der Quelle

Annotation:

Mesozoic tectonic events in different areas of the eastern North China Block (NCB) show consistency in tectonic time and genesis. The Triassic collision between NCB and Yangtze results in the nearly S-N strong compression in the Dabie, Jiaodong, and west Shandong areas in Middle Triassic-Middle Jurassic. Compression in the Yanshan area in the north part of NCB was mainly affected by the collision between Mongolia Block and NCB, as well as Siberia Block and North China-Mongolia Block in Late Triassic-Late Jurassic. However, in the eastern NCB, compressive tectonic system in Early Mesozoic was inversed into extensional tectonic system in Late Mesozoic. The extension in Late Mesozoic at upper crust mainly exhibits as extensional detachment faults and metamorphic core complex (MCC). The deformation age of extensional detachment faults is peaking at 120–110 Ma in Yanshan area and at 130–110 Ma in the Dabie area. In the Jiaodong area eastern to the Tan-Lu faults, the compression thrust had been continuing to Late Mesozoic at least in upper crust related to the sinistral strike slipping of the Tan-Lu fault zone.The extensional detachments in the eastern NCB would be caused by strong crust-mantle action with upwelling mantle in Late Mesozoic.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

47

Dostal, Jaroslav, und Michael Durning. „Geochemical constraints on the origin and evolution of early Mesozoic dikes in Atlantic Canada“. European Journal of Mineralogy 10, Nr. 1 (26.01.1998): 79–94. http://dx.doi.org/10.1127/ejm/10/1/0079.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

48

Wang, Yi Ni, Wen Liang Xu, Feng Wang und Xiao Bo Li. „New insights on the early Mesozoic evolution of multiple tectonic regimes in the northeastern North China Craton from the detrital zircon provenance of sedimentary strata“. Solid Earth 9, Nr. 6 (29.11.2018): 1375–97. http://dx.doi.org/10.5194/se-9-1375-2018.

Der volle Inhalt der Quelle

Annotation:

Abstract. To investigate the timing of deposition and provenance of early Mesozoic strata in the northeastern North China Craton (NCC) and to understand the early Mesozoic paleotectonic evolution of the region, we combine stratigraphy, U–Pb zircon geochronology, and Hf isotopic analyses. Early Mesozoic strata include the Early Triassic Heisonggou, Late Triassic Changbai and Xiaoyingzi, and Early Jurassic Yihe formations. Detrital zircons in the Heisonggou Formation yield ∼ 58 % Neoarchean to Paleoproterozoic ages and ∼ 42 % Phanerozoic ages and were sourced from areas to the south and north of the basins within the NCC, respectively. This indicates that Early Triassic deposition was controlled primarily by the southward subduction of the Paleo-Asian oceanic plate beneath the NCC and collision between the NCC and the Yangtze Craton (YC). Approximately 88 % of the sediments within the Late Triassic Xiaoyingzi Formation were sourced from the NCC to the south, with the remaining ∼ 12 % from the Xing'an–Mongolia Orogenic Belt (XMOB) to the north. This implies that Late Triassic deposition was related to the final closure of the Paleo-Asian Ocean during the Middle Triassic and the rapid exhumation of the Su–Lu Orogenic Belt between the NCC and YC. In contrast, ∼ 88 % of sediments within the Early Jurassic Yihe Formation were sourced from the XMOB to the north, with the remaining ∼ 12 % from the NCC to the south. We therefore infer that rapid uplift of the XMOB and the onset of the subduction of the Paleo-Pacific Plate beneath Eurasia occurred in the Early Jurassic.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

49

Zhong, Guangjian, Pibo Su, Changmao Feng, Shenghong Chen, Ming Sun, Hai Yi, Yanlin Wang, Junhui Yu, Jing Zhao und Zhongquan Zhao. „Mesozoic hydrocarbon accumulation model in the Northern South China sea“. IOP Conference Series: Earth and Environmental Science 1087, Nr. 1 (01.10.2022): 012053. http://dx.doi.org/10.1088/1755-1315/1087/1/012053.

Der volle Inhalt der Quelle

Annotation:

Abstract The ChaoShan Depression is the largest Mesozoic depression covering an area of 3.7 x 104 km2 where the relict Mesozoic strata are up to 5000 m thick. It has experienced disruption since the late Mesozoic. In early survey, the oil-gas migration condition and reservoiring mechanism are poorly expounded from the Meso-Cenozoic tectonic superposition due to poor seismic imaging to the deep Mesozoic layers. New seismic surveys using long streamers and quasi three-dimensional layouts has improved obviously the deep images of the Mesozoic formations, enabling analysis of tectono-stratigraphic features and petroleum geology. Correlating to the regional Mesozoic stratigraphic and facies characteristics from the well LF35-1-1 and onshore outcrops, two sets of source layer tested with high organic carbon content are interpreted within the upper Triassic to mid-Jurassic semi-closed gulf sequences which become thicker toward the east side of Dongsha Island. Three sets of potential reservoir beds are also interpreted, which are a basin-floor fan sandstone layer of the Triassic-Jurassic boundary, a limestone layer atop the mid Jurassic, and a sandy layer in the Upper Jurassic. Over the low bulge of the ChaoShan Depression, a big anticline is found bounded by two sets of faults which played as migration passage for hydrocarbon from the deep Mesozoic source to the reservoir layers. Likely, one set of the fault act reverse barrier to block the petroleum escape, thus form the fault-bounded trap, favorable for future exploration.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

50

Sukh-Dev. „Floristic zones in the Mesozoic formations and their relative age“. Journal of Palaeosciences 36 (31.12.1987): 161–67. http://dx.doi.org/10.54991/jop.1987.1572.

Der volle Inhalt der Quelle

Annotation:

Through a comprehensive analytical study of the Mesozoic flora and synthesis of the available data 12 assemblage zones and a floral succession are established. These assemblage zones also extend into the Early Cretaceous flora in the neighboring countries: Pakistan, Nepal, Bhutan and Sri Lanka. The Gondwana Triassic elements and the European Jurassic-Cretaceous elements in the flora are highlighted. The inter-relationship of the Mesozoic floras of Gondwanaland, European and Asian countries is examined. The relative age of the biozones is worked out on the basis of plant megafossils, palynology, paleontology, stratigraphy and radiometry. It is suggested that the concept of Gondwana be replaced by chronostratigraphic terms, viz., Triassic, Jurassic and Cretaceous for the Indian Mesozoic sediments.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

Wir bieten Rabatte auf alle Premium-Pläne für Autoren, deren Werke in thematische Literatursammlungen aufgenommen wurden. Kontaktieren Sie uns, um einen einzigartigen Promo-Code zu erhalten!