Results 141 to 150 of about 147,685 (356)
Journal of Anatomy, EarlyView.A fossil rostrum fragment of a large teleost fish from the Upper Cretaceous of Northern Italy reveals remarkable anatomical convergences with Cenozoic and Recent billfishes (marlins, swordfishes, and akin). The extinct group Plethodidae independently acquired a long snout, micro‐teeth, and oil‐gland sinuses well before the evolution of true billfishes.
Giovanni Serafini +5 more
wiley +1 more source
Dynamic anoxic ferruginous conditions during the end-Permian mass extinction and recovery
Nature Communications, 2016 The end-Permian mass extinction, ∼252 million years ago, is notable for a complex recovery period of ∼5 Myr. Widespread euxinic (anoxic and sulfidic) oceanic conditions have been proposed as both extinction mechanism and explanation for the protracted ...
M. Clarkson +7 more
semanticscholar +1 more source
Известия высших учебных заведений: Геология и разведка, 2019 A new species of algae from the formal genus Algites Seward, 1894 — A. samarensis sp. nov. from the Lower Kazanian substage near the village of Russky Baitugan (northeast of the Samara Region) has been described.
M. L. Papernyi
doaj +1 more source
Review of Dysmorphoptilidae Handlirsch (Hemiptera: Cicadomorpha) from the Argentinean Triassic, with description of a new subfamily, and a new species [PDF]
, 2006 This contribution presents new fossil insect taxa of the order Hemiptera (Cicadomorpha, Dysmorphoptilidae, Gallegomorphoptilinae subfam. n.) from the Ischichuca Formation (late Middle Triassic to early Late Triassic) from La Rioja Province (Argentina ...
Gallego, Oscar Florencio +1 more
core
I.—Remarks upon the Relations and Grouping of the Permian and Triassic Rocks [PDF]
, 1874 Horace B. Woodward
openalex +1 more source
Sedimentology, EarlyView.ABSTRACT Structurally controlled hydrothermal dolomitization, commonly driven by high‐pressure, high‐temperature fluid–rock reactions, offers insights into the tectonic evolution of sedimentary basins and the geochemical composition of their diagenetic fluids.
Huachuan Jiang +7 more
wiley +1 more source
Fusulinids from the Yayamadake Limestone of the Hikawa Valley, Kumamoto Prefecture, Kyushu, Japan Part Ⅲ : Fusulinids of the Lower Permian [PDF]
, 1958 Kametoshi Kanmera
openalex +1 more source
Journal of the Geological Society, 2017 The genesis of Permian magmatism in southern South America is actively debated, particularly in relation to the origin of Patagonia. U–Pb zircon ages of c.
P. Castillo +4 more
semanticscholar +1 more source
Sedimentology, EarlyView.ABSTRACT For most of Earth history, carbonate sediments deposited in shallow marine settings are the only remaining archive of changing biogeochemical cycles. All deep‐sea sediments older than >200 Ma have been subducted and are therefore lost from the record. Stable carbon isotope (δ13C) values of shallow marine carbonates are available for older time
Colleen N. Brown +3 more
wiley +1 more source