نتایج جستجو برای: some jurassic and cretaceous sediments sub

تعداد نتایج: 16973334  

2017
Martin Kaspar Reiser Ralf Schuster Richard Spikings Peter Tropper Bernhard Fügenschuh

New Ar-Ar muscovite and Rb-Sr biotite age data in combination with structural analyses from the Apuseni Mountains provide new constraints on the timing and kinematics of deformation during the Cretaceous. Time-temperature paths from the structurally highest basement nappe of the Apuseni Mountains in combination with sedimentary data indicate exhumation and a position close to the surface after ...

2003
Paul Kapp Michael A. Murphy An Yin Mark Harrison Lin Ding Jinghu Guo

[1] In the Shiquanhe area of far-western Tibet, midCretaceous strata lie unconformable on ophiolitic melange and Jurassic flysch associated with the Bangong-Nujiang suture zone. On the basis of our mapping and geochronologic studies, we suggest that these Cretaceous strata were shortened by >57% over a north south distance of 50 km during Late Cretaceousearly Tertiary time. The Late Cretaceous ...

Journal: :Journal of Maps 2021

The map ‘Geology of the Monte Banchetta – Punta Rognosa area (Troncea valley, Western Alps)’ details lithostratigraphy and structural setting a key sector in Alpine chain, characterized by close associations continental oceanic basements, meta-sediments. mapped unit (BRU), tectonically juxtaposed to different metaophiolitic units, comprises succession, made serpentinized mantle overlain Middle-...

2007
William C. McClelland E. Gehrels Jason B. Saleeby

Upper Jurassic and Lower Cretaceous bashal strata are preserved in a discontinuous belt along the inboard margin of the Alexander-WrangelliaPeninsular terrane (AWP) in Alaska and western Canada, on the outboard margin of terranes in the Canadian Cordillera accreted to North America prior to Late Jurassic time, and along the Cordilleran margin from southern Oregon to southern California. Nearly ...

2011
Michele G Bishop

The Bonaparte Gulf Basin Province (USGS #3910) of northern Australia contains three important hydrocarbon source-rock intervals. The oldest source-rock interval and associated reservoir rocks is the Milligans-Carboniferous, Permian petroleum system. This petroleum system is located at the southern end of Joseph Bonaparte Gulf and includes both onshore and offshore areas within a northwest to so...

Journal: :Basin Research 2021

Deep-water stratigraphic successions from syn- to post-rift stages are an archive of evolving physiographic configurations, and can record axial transverse sedimentary sources. The healing topography decreases the influence syn-rift structures on sedimentation patterns transport processes over time, which leads a long-term transition dominantly dispersal patterns. Halten Dønna terraces, offshor...

Journal: :Proceedings. Biological sciences 2010
Roger B J Benson Richard J Butler Johan Lindgren Adam S Smith

The fossil record is our only direct means for evaluating shifts in biodiversity through Earth's history. However, analyses of fossil marine invertebrates have demonstrated that geological megabiases profoundly influence fossil preservation and discovery, obscuring true diversity signals. Comparable studies of vertebrate palaeodiversity patterns remain in their infancy. A new species-level data...

Journal: :Biology letters 2013
Valentin Fischer Robert M Appleby Darren Naish Jeff Liston James B Riding Stephen Brindley Pascal Godefroit

Cretaceous ichthyosaurs have typically been considered a small, homogeneous assemblage sharing a common Late Jurassic ancestor. Their low diversity and disparity have been interpreted as indicative of a decline leading to their Cenomanian extinction. We describe the first post-Triassic ichthyosaur from the Middle East, Malawania anachronus gen. et sp. nov. from the Early Cretaceous of Iraq, and...

Journal: :Current biology : CB 2017
Valentin Fischer Roger B J Benson Nikolay G Zverkov Laura C Soul Maxim S Arkhangelsky Olivier Lambert Ilya M Stenshin Gleb N Uspensky Patrick S Druckenmiller

Plesiosaurs were the longest-surviving group of secondarily marine tetrapods, comparable in diversity to today's cetaceans. During their long evolutionary history, which spanned the Jurassic and the Cretaceous (201 to 66 Ma), plesiosaurs repeatedly evolved long- and short-necked body plans [1, 2]. Despite this postcranial plasticity, short-necked plesiosaur clades have traditionally been regard...

Journal: :International Geology Review 2023

The classic Neotethyan Ankara Melange formed within the Triassic-Eocene İzmir-Ankara-Erzincan ocean (‘N Neotethys’), bordered in central Anatolia by Kırşehir and Tauride-Anatolide continental units to south discontinuous Sakarya continent northwest. Farther north, separate Intra-Pontide probably remained partly open until early Cenozoic. developed via phases of intra-oceanic accretion (mainly p...

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