Trans-Atlantic application of the Baltic Middle and Upper Ordovician carbon isotope zonation [PDF]
Estonian Journal of Earth Sciences, 2015 Application of the recently introduced Baltic d13C isotope zonation to a composite North American Darriwilian through Hirnantian succession shows that in most intervals there is good trans-Atlantic agreement not only between the isotope zones but also ...
Stig M. Bergström +4 more
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Hirnantia sagittifera (Brachiopoda) and Mucronaspis mucronata s.l. (Trilobita) in the Upper Ordovician of the East Baltic: taxonomy and distribution [PDF]
Estonian Journal of Earth Sciences, 2012 The brachiopod Hirnantia sagittifera (M’Coy) and trilobite morphs of the genus Mucronaspis from the topmost Ordovician Porkuni Stage of the central East Baltic are described and compared with those from the Hirnantian Stage of other regions.
Linda Hints +2 more
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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
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Frontiers in Earth Science, 2022 Parallel positive excursions of organic carbon (δ13Corg) and pyrite sulfur (δ34Spy) isotopes occurred globally during the Hirnantian glacial period. However, the reasons for these isotope excursions and their relationship with paleoenvironmental dynamics
Zaitian Dong +7 more
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An extremely brief end Ordovician mass extinction linked to abrupt onset of glaciation
Solid Earth Sciences, 2019 The end Ordovician mass extinction (EOME) was the second most severe biotic crisis in Phanerozoic, and has been widely linked to a major glaciation. However, robust geochronology of this interval is still lacking.
Ming-Xing Ling +17 more
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A multiproxy study of the Puhmu core section (Estonia, Upper Ordovician): consequences for stratigraphy and environmental interpretation [PDF]
Estonian Journal of Earth Sciences, 2017 A multiproxy study of the Katian and Hirnantian in the Puhmu core in NE Estonia resulted in new data on chitinozoan and brachiopod biostratigraphy. Some mass occurrences of dasycladacean algae are tied to small early Katian ‘reefs’.
Dimitri Kaljo +3 more
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Reconstruction of the Hirnantian (Late Ordovician) Palaeotopography in the Upper Yangtze Region [PDF]
, 2014 Reconstruction of the Hirnantian (Late Ordovician) palaeotopography in South China is important for understanding the distribution pattern of the Hirnantian marine depositional environment.
Wu, Shuang-Ye +3 more
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Frontiers in Ecology and EvolutionThe Hirnantian Ice Age had a significant impact on marine invertebrate biota at the end of the Ordovician due to drastic cooling and falling sea levels.
Sara C. Memória +9 more
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Discovery of trimerellide brachiopod Gasconsia from the Ordovician of Estonia [PDF]
Estonian Journal of Earth SciencesIn this study, the first trimerellide brachiopods from Estonia are described. They occur in the uppermost Katian (Upper Ordovician) shallow shelf environments and represent some of the largest Ordovician brachiopods.
Linda Hints, Jiayu Rong
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The youngest representatives of the genus Ribeiria Sharpe, 1853 from the late Katian of the Prague Basin (Bohemia) [PDF]
Estonian Journal of Earth Sciences, 2015 Ribeiria apusoides and Ribeiria johni sp. nov. are described from the late Katian of the Prague Basin (Bohemia) as the youngest representatives of the genus Ribeiria.
Marika Polechová
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