Results 101 to 110 of about 893 (201)

The Hirnantian (Late Ordovician) brachiopod fauna of the East Baltic: Taxonomy of the key specuies

, 2015
Rhynchonelliformean brachiopods, belonging to 17 genera, are described from the East Baltic Porkuni Regional Stage, correlated with the global Hirnantian Stage.
Hints, L., Harper, D.A.T.
core   +1 more source

First record of the Hirnantian (Upper Ordovician) delta C-13 excursion in the North American Midcontinent and its regional implications

, 2006
The most prominent of the two major global delta C-13 excursions in the Ordovician, the Hirnantian delta C-13 excursion (HICE), which is previously recorded from the uppermost Ordovician in a few sections in Nevada, Quebec, Arctic Canada, Baltoscandia ...
Bergstroem, Stig M., Saltzman, Matthew M., Schmitz, Birger,, Lund University.   +3 more
core   +2 more sources

Sedimentary and faunal events revealed by a revised correlation of post-glacial Hirnantian (Late Ordovician) strata in the Welsh Basin, UK

, 2009
The discovery of a previously unrecognized unconformity and of new faunas in the type Llandovery area underpins a revised correlation of Hirnantian strata in mid Wales.
Davies, Jeremy R., Williams, Mark, Richard A. Waters, Mark Williams, Waters, Richard A., Zalasiewicz, Jan A., David Wilson, Jeremy R. Davies, Schofield, David I., David I. Schofield, Wilson, David, Jan A. Zalasiewicz   +11 more
core   +1 more source

Ordovician-Silurian true polar wander as a mechanism for severe glaciation and mass extinction. [PDF]

Nat Commun, 2022
Jing X, Yang Z, Mitchell RN, Tong Y, Zhu M, Wan B.   +5 more
europepmc   +1 more source

Chitinozoan biostratigraphy and carbon isotope stratigraphy from the Upper Ordovician Skogerholmen Formation in the Oslo Region : a new perspective for the Hirnantian lower boundary in Baltica

, 2017
The end-Ordovician has received wide attention because it hosts major global events including mass extinctions, glaciations, significant sea-level fluctuations, and large-scale perturbations of the Earth's carbon cycle.
Vandenbroucke, Thijs, McLaughlin, Patrick I, Thijs R.A. Vandenbroucke, Vandenbroucke, Thijs R. A., McLaughlin, Patrick I., Patrick I. McLaughlin, Amberg, Chloé E. A., Nielsen, Arne Thorshøj, Axel Munnecke, Nielsen, Arne T, Chloé E.A. Amberg, Munnecke, Axel, Arne T. Nielsen, Amberg, Chloe EA   +13 more
core   +1 more source

Geochemical Changes in the Late Ordovician to Early Silurian Interval in the Northern Margin of the Upper Yangtze Platform, Southern China: Implications for Hydrothermal Influences and Paleocean Redox Circumstances. [PDF]

ACS Omega, 2023
Fu X, Liu X, Xiong S, Li X, Wu Q, Xiao B.   +5 more
europepmc   +1 more source

Shared patterns in body size declines among crinoids during the Palaeozoic extinction events. [PDF]

Sci Rep, 2021
Salamon MA, Brachaniec T, Kołbuk D, Saha A, Gorzelak P.   +4 more
europepmc   +1 more source

Truncated bimodal latitudinal diversity gradient in early Paleozoic phytoplankton. [PDF]

Sci Adv, 2021
Zacaï A, Monnet C, Pohl A, Beaugrand G, Mullins G, Kroeck DM, Servais T.   +6 more
europepmc   +1 more source

A fossil proof for the origin of the Hirnantian glaciomarine record in Bulgaria: A preliminary result

Review of the Bulgarian Geological Society
The Sirman Formation in the Svoge Unit is built of Hirnantian diamictites, a product of the Gondwana glaciation at the end of the Ordovician. One subangular lonestone of light gray sandstone of size of about 1 cm was found in the lower part of the formation.
Sachanski, V., Gutiérrez-Marco, J. C., Georgiev, S., Lakova, I., Yanev, S.   +4 more
openaire   +2 more sources

Cryptospore assemblages from Upper Ordovician (Katian-Hirnantian) strata of Anticosti Island, Quebec, Canada, and Estonia: Palaeophytogeographic and palaeoclimatic implications

, 2011
Rich palynological assemblages have been recovered from deposits of Hirnantian age in Anticosti Island (Quebec, Canada), and in borehole Valga-10 in southern Estonia. The assemblages are well preserved, and include acritarchs, chitinozoans.
VECOLI, MARCO, Hints O., Delabroye A, Spina A   +3 more
core   +1 more source