Results 91 to 100 of about 1,166 (193)

The pelmatozoan fauna of the High Mains Formation (Ordovician: Hirnantian) of the Craighead Inlier, Strathclyde

, 1992
Faunas of disarticulated ossicles, particularly columnals, are a potentially important source of data for helping to elucidate the patterns of evolution and extinction shown by pelmatozoans in the late Ordovician.
D. A. T. Harper, S. K. Donovan
core   +1 more source

Astronomical control on upper ordovician – lower silurian organic matter enrichment in South China

Frontiers in Earth Science
Astronomical forcing governed Late Ordovician–Early Silurian climate dynamics, yet high-resolution Astronomical Time Scales (ATS) and organic enrichment mechanisms during the end-Ordovician extinction remain poorly constrained.
Jinjie Yong, Shaoyong Hu, Jie He, Zhicheng Liu, Mengtian Zheng, Peng Luo, Xin Liu, Wei Dong   +7 more
doaj   +1 more source

Cyclic late Katian through Hirnantian glacioeustasy and its controls on the development of the organic-rich shale, South China

, 2019
Suppliments for paper "Cyclic late Katian through Hirnantian glacioeustasy and its controls on the development of the organic-rich shale, South ...
Lu, Y (via Mendeley Data), Lu, Yangbo
core   +1 more source

Brachiopods from the Hirnantian Stage (Ordovician–Silurian) at Percé, Quebec

, 1976
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Lespérance, Pierre Jacques, Sheehan, P M   +1 more
openaire   +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

Ordovician plate tectonic and paleogeographic maps

, 2023
Atlas of Ordovician plate tectonic and paleogeographic maps (Hirnantian, 445 Ma)
Christopher R. Scotese (6998246)
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  

Limitation of fixed nitrogen and deepening of the carbonate-compensation depth through the Hirnantian at Dob's Linn, Scotland [PDF]

, 2019
This study was funded by University of Washington Department of Earth and Space Sciences Harry Wheeler Scholarship and Jody Bourgeois Graduate Student Support Fund granted to MCK.
Hillier, Stephen, Koehler, Matthew C., Prave, Tony, Stüeken, Eva E., Koehler, M.C., Stüeken, Hillier, Stephen,, Swedish University of Agricultural Sciences., E.E., Stueken, Eva E.,, Hillier, S., Prave, T., Koehler, Matthew C.,, Prave, Anthony R.,, Prave, Tony; id_orcid, Stüeken, Eva E.; id_orcid   +15 more
core   +1 more source

New insights on the Hirnantian palynostratigraphy of the rio Ceira section, Buçaco, Portugal

, 2011
The Lower Palaeozoic successions of Portugal are well represented in the Central Iberian Zone (Cll), one of the main tectonostratigraphic domains of the Iberian Massif.
Lopes, Gilda, Vaz, Nuno, Sequeira, A. J. D., Piçarra, J. M., Fernandes, Paulo, Pereira, Zélia   +5 more
openaire   +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