The Permian-Triassic alluvial rift succession in the Horda Platform area is analysed to construct a refined depositional model. study demonstrates how subsurface continental successions may be stratigraphically subdivided and correlated by integrating seismic well-log data concert with conceptual models. Regional unconformities mark top base of succession, which sub-divided into six stratigraph...

The Beyşehir–Hoyran–Hadim Nappes crop out over 700 km from NW to SE. Above a regionally autochthonous Tauride carbonate platform the Beyşehir–Hoyran Nappes begin with a thrust sheet (c. 400 m) of mainly redeposited carbonates, quartzose sandstones and mudstones of Mid–Late Triassic age, interpreted as a proximal slope–base-of-slope succession. Above is a thrust sheet (c. 1 km) of Middle–Upper T...

Delayed Earth system recovery following the end-Permian mass extinction is often attributed to severe ocean anoxia. However, the extent and duration of Early Triassic anoxia remains poorly constrained. Here we use paired records of uranium concentrations ([U]) and (238)U/(235)U isotopic compositions (δ(238)U) of Upper Permian-Upper Triassic marine limestones from China and Turkey to quantify va...

Abstract The Rhynchonellida is a major group of brachiopods that survived the “big five” mass extinctions and flourished after Permian/Triassic (P/Tr) crisis. However, phylogenetic character evolution in across P/Tr transition poorly understood. In view widespread homoplasy this order, we employ tip-dated Bayesian analysis to reconstruct relationships for late Permian–Triassic rhynchonellides. ...

Adaptive radiations are central to macroevolutionary theory. Whether triggered by acquisition of new traits or ecological opportunities arising from mass extinctions, it is debated whether adaptive radiations are marked by initial expansion of taxic diversity or of morphological disparity (the range of anatomical form). If a group rediversifies following a mass extinction, it is said to have pa...

The ascent of dinosaurs in the Triassic is an exemplary evolutionary radiation, but the earliest phase of dinosaur history remains poorly understood. Body fossils of close dinosaur relatives are rare, but indicate that the dinosaur stem lineage (Dinosauromorpha) originated by the latest Anisian (ca 242-244 Ma). Here, we report footprints from the Early-Middle Triassic of Poland, stratigraphical...

Species of the extinct family Dysmorphoptilidae with distinctly punctate and emarginate tegmina are one of the most characteristic elements of the hemipteran fauna of the three Queensland Triassic fossil insect-bearing formations-the Middle Triassic (Anisian) Gayndah Formation at Gayndah, the Late Triassic (Norian) Mount Crosby Formation at Mount Crosby, and the Late Triassic (Norian) Blackston...

The biotic recovery from Earth's most severe extinction event at the Permian-Triassic boundary largely reestablished the preextinction structure of marine trophic networks, with marine reptiles assuming the predator roles. However, the highest trophic level of today's marine ecosystems, i.e., macropredatory tetrapods that forage on prey of similar size to their own, was thus far lacking in the ...

Unspecified DOI: 10.1111/j.1751-8369.1990.tb00382.x Posted at the Zurich Open Repository and Archive, University of Zurich ZORA URL: http://doi.org/10.5167/uzh-112675 Originally published at: Mørk, Atle; Vigran, Jorunn Os; Hochuli, Peter A (1990). Geology and palynology of the Triassic succession of Bjørnøya. Polar Research, 8(2):141-163. DOI: 10.1111/j.1751-8369.1990.tb00382.x Geology and paly...