Results 31 to 40 of about 3,916,400 (215)

Impact of global climate cooling on Ordovician marine biodiversity

open access: yesNature Communications, 2023
Global cooling has been proposed as a driver of the Great Ordovician Biodiversification Event, the largest radiation of Phanerozoic marine animal Life.
Daniel Eliahou Ontiveros   +5 more
doaj   +1 more source

Late Ordovician mass extinction caused by volcanism, warming, and anoxia, not cooling and glaciation: REPLY

open access: yesGeology, 2020
The Ordovician saw major diversification in marine life abruptly terminated by the Late Ordovician mass extinction (LOME). Around 85% of species were eliminated in two pulses 1 m.y. apart.
D. Bond, S. Grasby
semanticscholar   +1 more source

Lower Palaeozoic source rocks in Manjiaer Sag, Tarim Basin

open access: yesPetroleum Exploration and Development, 2008
Considering its vertical distribution characteristics, this article argues that the Lower Palaeozoic source rock in the Manjieer Sag is composed of three sets of source rocks of Middle-Lower Cambrian, Middle-Lower Ordovician, and Upper Ordovician.
Meng-jun ZHAO   +5 more
doaj   +1 more source

Oxygen Isotopes from Apatite of Middle and Late Ordovician Conodonts in Peri-Baltica (The Holy Cross Mountains, Poland) and Their Climatic Implications

open access: yesGeosciences, 2022
This report provides oxygen isotopes from apatite of late Middle and Late Ordovician conodonts from the southern Holy Cross Mountains in south-eastern Poland.
Wiesław Trela   +3 more
doaj   +1 more source

The Digital Atlas of Ordovician Life: digitizing and mobilizing data for paleontologists and the public [PDF]

open access: yesEstonian Journal of Earth Sciences, 2014
A new online resource, “The Digital Atlas of Ordovician Life: Exploring the Fauna of the Cincinnati Region” (www.OrdovicianAtlas.org), provides a tool for exploring the diversity, systematics, biogeography and stratigraphy of Late Ordovician fossils of ...
Alycia L. Stigall   +2 more
doaj   +1 more source

The youngest representatives of the genus Ribeiria Sharpe, 1853 from the late Katian of the Prague Basin (Bohemia) [PDF]

open access: yesEstonian Journal of Earth Sciences, 2015
Ribeiria apusoides and Ribeiria johni sp. nov. are described from the late Katian of the Prague Basin (Bohemia) as the youngest representatives of the genus Ribeiria.
Marika Polechová
doaj   +1 more source

The Truong Son, Loei-Phetchabun, and Kontum Terranes in Indochina: Provenance, Rifting, and Collisions

open access: yesFrontiers in Earth Science, 2021
The three main regions of Indochina are defined as the Truong Son, Loei-Phetchabun, and Kontum terranes. The aim of this review is to integrate numerous petrological studies with sedimentary, palaeontological, and provenance studies in order to construct
Clive Burrett   +3 more
doaj   +1 more source

The Accumulation Characteristics of the Paleozoic Reservoir in the Central-Southern Ordos Basin Recorded by Organic Inclusions

open access: yesGeofluids, 2021
The Permian tight clastic reservoir and Ordovician carbonate reservoir were developed in the central-southern Ordos Basin. This study investigated the fluid inclusion petrography, diagenetic fluid characteristics, formation process of natural gas ...
Ruijing Zhu   +6 more
doaj   +1 more source

Five new malformed trilobites from Cambrian and Ordovician deposits from the Natural History Museum [PDF]

open access: yesPeerJ, 2023
Injured trilobites present insight into how a completely extinct group of arthropods responded to traumatic experiences, such as failed predation and moulting complications.
Russell D.C. Bicknell, Patrick M. Smith
doaj   +2 more sources

Mercury spikes suggest volcanic driver of the Ordovician-Silurian mass extinction

open access: yesScientific Reports, 2017
The second largest Phanerozoic mass extinction occurred at the Ordovician-Silurian (O-S) boundary. However, unlike the other major mass extinction events, the driver for the O-S extinction remains uncertain.
Qing Gong   +8 more
doaj   +1 more source

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