Results 101 to 110 of about 1,764 (217)

Earliest land plants created modern levels of atmospheric oxygen [PDF]

, 2016
The progressive oxygenation of the Earth’s atmosphere was pivotal to the evolution of life, but the puzzle of when and how atmospheric oxygen (O2) first approached modern levels (~21%) remains unresolved.
Benjamin J. W. Mills, Canfield, Dahl, Fairon-Demaret, Gentzis, Glasspool, Herrmann, Kazumi Ozaki, Matthew R. Saltzman, Michelsen, Nägler, Pflug, Philipp Porada, Riis, Stuart J. Daines, Tais W. Dahl, Timothy M. Lenton, Zhou   +17 more
core   +2 more sources

Enhanced Continental Weathering Triggered the Anoxia of Seawater and Mass Extinctions During the Late Ordovician

Journal of Marine Science and Engineering
During the Late Ordovician period, changes in climate and mass extinctions were observed; however, the factors influencing these phenomena have not been fully understood.
Pan Tang, Xiangrong Yang, Detian Yan
doaj   +1 more source

Petrography and geochemistry of Palaeozoic quartz-rich sandstones from Saudi Arabia: implications for provenance and chemostratigraphy [PDF]

, 2016
The Arabian Peninsula hosts a thick Palaeozoic succession, ranging from the Cambrian through the Permian. It not only contains deposits of the two major Palaeozoic glaciations but also holds both the major Palaeozoic hydrocarbon source and reservoir ...
Bassis, A, Hinderer, M, Meinhold, G
core   +1 more source

Biostratigraphy of Acritarchs and Chitinozoans in Ordovician Strata from the Fazel Abad Area, Southeastern Caspian Sea, Alborz Mountains, Northern Iran: Stratigraphic Implications [PDF]

Journal of Sciences, Islamic Republic of Iran, 2017
Sixty-four surface samples from the Lower Palaeozoic rock units (mainly Lalun,Abastu and Abarsaj formations) near Kholin-Darreh village in the Fazel Abad area,southeastern the Caspian Sea, Northern Iran, were analyzed to determine their agerelationships.
M. Ghavidel-syooki
doaj  

Ediacara biota flourished in oligotrophic and bacterially dominated marine environments across Baltica. [PDF]

, 2018
Middle-to-late Ediacaran (575-541 Ma) marine sedimentary rocks record the first appearance of macroscopic, multicellular body fossils, yet little is known about the environments and food sources that sustained this enigmatic fauna.
Bekker, Andrey, Junium, Christopher K, Kuznetsov, Anton, Love, Gordon D, Pehr, Kelden, Podkovyrov, Victor, Shumlyanskyy, Leonid, Sokur, Tetyana   +7 more
core   +3 more sources

A late-Ordovician phreatomagmatic complex in marine soft-substrate environment: The Crozon volcanic system, Armorican Massif (France) [PDF]

, 2009
International audienceThe mafic lavas and the diabases of Crozon (Armorican Massif, France), belong to an anorogenic Ordovician volcanic complex, emplaced on a rifted passive margin in North Gondwana.
Bénard, Antoine, Caroff, Martial, Darboux, Jean-René, Vidal, Muriel   +3 more
core   +2 more sources

The Hirnantian graptolites Normalograptus persculptus and 'Glyptograptus' bohemicus: stratigraphical consequences of their synonymy

, 1996
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Štorch, Petr, Loydell, David K
openaire   +2 more sources

87th Annual Meeting of the Meteoritical Society 2025: Abstracts

Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley   +1 more source

Rapid marine oxygen variability: Driver of the Late Ordovician mass extinction. [PDF]

Sci Adv, 2022
Kozik NP, Young SA, Newby SM, Liu M, Chen D, Hammarlund EU, Bond DPG, Them TR, Owens JD.   +8 more
europepmc   +1 more source

Hirnantian Glaciation

, 2023
Chuanlong Mou, Xiuping Wang, Qiyu Wang, Xiangying Ge, Bowen Zan, Kenken Zhou, Xiaowei Chen, Wei Liang   +7 more
openaire   +1 more source