, 2022 Summary. We provide a stratigraphic assessment of the Upper Ordovician through lowermost Silurian of theStora Sutarve drillcore from southernmost Gotland. Based on the combined information from lithological characteristics and carbon isotope chemostratigraphy we document a sedimentary succession tentatively ranging fromthe Kinnekulle K-bentonite near ...
Gunnarsson, Niklas +6 more
core +3 more sources
Pecularities of composition, structure and environments of Hirnantian deposits in the Timan-northern Ural sedimentary basin [PDF]
Литосфера, 2018 The results of lithological and geochemical study of the Hirnantian deposits on the western slope of the Subpolar (Ko-BKB and Ko-108/01 sections) and Northern (BK-2 section) Urals are presented.
Anna I. Antoshkina +1 more
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An earth system approach to understanding the end-Ordovician (Hirnantian) mass extinction [PDF]
, 2014 The Hirnantian mass extinction is recognized as the first of the "big three" extinctions and, along with the end-Permian and end-Cretaceous events, is the result of an acceleration in biotic extinctions concomitant with a rise in originations. The Hirnantian mass extinction is characterized by high taxonomic impact and within-community extinctions ...
Armstrong, H. A., Harper, D.A.T.
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Changes in shelf phosphorus burial during the Hirnantian glaciation and its implications [PDF]
Estonian Journal of Earth Sciences, 2023 The Late Ordovician mass extinction occurred during an icehouse interval, accompanied by the glaciation of the supercontinent Gondwana, which was located at the South Pole at that time.
Johann Müller +4 more
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The succession of Hirnantian events based on data from Baltica: brachiopods, chitinozoans, conodonts, and carbon isotopes [PDF]
Estonian Journal of Earth Sciences, 2008 The Hirnantian (late Ordovician) environment was complex and dynamic. Understanding the correct order of events and their precise correlation with a time scale are extremely important for the development of different kinds of environmental ...
Kaljo, Dimitri +3 more
doaj +2 more sources
Late Ordovician (Sandbian–Hirnantian) marine gastropods from the Argentine Precordillera: their biogeographical significance in a middle to high latitudinal setting [PDF]
Acta Palaeontologica PolonicaGastropods from the Upper Ordovician of the Argentine Precordillera received less attention than other coeval marine invertebrates in this region. The present contribution supplies accurate taxonomic information recovering 10 gastropod genera which are ...
Mariel Ferrari +2 more
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Global climate stabilisation by chemical weathering during the Hirnantian glaciation [PDF]
Geochemical Perspectives Letters, 2017 Chemical weathering of silicate rocks is a primary drawdown mechanism of atmospheric carbon dioxide. The processes that affect weathering are therefore central in controlling global climate. A temperature-controlled “weathering thermostat” has long been proposed in stabilising long-term climate, but without definitive evidence from the geologic record.
Lenton, TM +5 more
openaire +8 more sources
Subaerial speleothems and deep karst in central Sweden linked to Hirnantian glaciations [PDF]
Journal of the Geological Society, 2015 The limestones of the upper Katian Boda mud mounds (Ordovician) of the Siljan district in central Sweden are deeply fractured. The fissures were partly synsedimentary and are often lined with stromatolite-like crusts. These crusts thus far are the only known subaerial Ordovician speleothems.
Kröger, Björn +6 more
openaire +3 more sources
Geophysical Monograph Series, Page 1-26., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Richard E. Ernst +8 more
wiley +4 more sources
Miospore assemblages from Late Ordovician (Katian-Hirnantian), Ghelli Formation, Alborz Mountain Range North-eastern Iran: Palaeophytogeographic and palaeoclimatic implications [PDF]
Journal of Sciences, Islamic Republic of Iran, 2016 Well-preserved miospore assemblages are recorded from the Late Ordovician (Katian-Hirnantian), Ghelli Formation in Pelmis-gorge at the north-eastern Alborz Mountain The palynomorphs were extracted from siliciclastic deposits which are well-dated by using
M. Ghavidel-syooki
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