Hirnantian Isotope Carbon Excursion in Gorny Altai, southwestern Siberia [PDF]
Estonian Journal of Earth Sciences, 2015 The Hirnantian Isotope Carbon Excursion (HICE), a glaciation-induced positive δ13C shift in the end-Ordovician successions, has been widely used in chemostratigraphic correlation of the Ordovician–Silurian boundary beds in many areas of the world ...
Nikolay V. Sennikov +2 more
doaj +2 more sources
AGU Advances, 2022 The Ordovician (Hirnantian; 445 Ma) hosts the second most severe mass extinction in Earth history, coinciding with Gondwanan glaciation and increased geochemical evidence for marine anoxia.
Nevin P. Kozik +4 more
doaj +2 more sources
Geophysical Monograph Series, Page 169-190., 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.
Nasrrddine Youbi +9 more
wiley +3 more sources
The latest Ordovician Hirnantian brachiopod faunas: New global insights [PDF]
Earth-Science Reviews, 2020 Abstract The temporal and spatial distribution of Hirnantian brachiopod faunas are reviewed based on a new, comprehensive dataset from over 20 palaeoplates and terranes, a revised correlation scheme for Hirnantian strata and numerical methods including network analysis. There were two successive evolutionary faunas: 1.
Jiayu, Rong +5 more
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Ostracods of the Ordovician–Silurian boundary beds: Jūrmala core (Latvia) and its implications for Baltic stratigraphy [PDF]
Estonian Journal of Earth Sciences, 2020 Ostracods of the Ordovician and Silurian transition interval in the JÅ«rmala section, Latvia, were studied. The diverse pre-Hirnantian ostracod assemblage is replaced by the Harpabollia harparum association that has been recorded across the Baltoscandian
Tõnu Meidla +3 more
doaj +1 more source
Reconstruction of the mid-Hirnantian palaeotopography in the Upper Yangtze region, South China [PDF]
Estonian Journal of Earth Sciences, 2014 Reconstruction of the Hirnantian (Late Ordovician) palaeotopography in South China is important for understanding the distribution pattern of the Hirnantian marine depositional environment.
Linna Zhang +3 more
doaj +1 more source
Latest Ordovician age of the Spinachitina fragilis Chitinozoan Biozone in Baltoscandia [PDF]
Estonian Journal of Earth Sciences, 2023 The global Spinachitina fragilis Chitinozoan Biozone has been considered the lowermost Silurian zone in most publications. S. fragilis was first described from the Ohesaare drill core, Estonia, and utilised as a Baltic regional zonal taxon together with ...
Jaak Nõlvak, Yan Liang, Olle Hints
doaj +1 more source
The first Hirnantian (uppermost Ordovician) odontopleurid trilobite from Western Gondwana (Argentina) [PDF]
REVISTA BRASILEIRA DE PALEONTOLOGIA, 2014 An odontopleurid trilobite remain is described for the fi rst time from Hirnantian (uppermost Ordovician) rocks of Western Gondwana. Very rare material, represented by a single left librigena, comes from a new fossil locality of the Don Braulio Formation in the Eastern Argentine Precordillera.
Halpern, Karen +2 more
openaire +2 more sources
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 +6 more sources
The supercontinent cycle and Earth's long‐term climate
Annals of the New York Academy of Sciences, Volume 1515, Issue 1, Page 33-49, September 2022., 2022 The supercontinent cycle, by which Earth history is viewed as having been punctuated by the episodic assembly and breakup of supercontinents, has, through its management of plate motion, planetary geography, sea level and mantle circulation, profoundly influenced Earth's long‐term climatic history.
R. Damian Nance
wiley +1 more source