Middle–Late Ordovician organic- walled phytoplankton from Sweden: diversity and early radiation [PDF]
Estonian Journal of Earth Sciences, 2023 The Borenshult-1 core, drilled in the vicinity of Motala, east of Lake Vättern in south central Sweden, comprises a well-dated and nearly complete succession of marine marly carbonates deposited relatively close to land. The 34 core samples analyzed for
Claudia V. Rubinstein, Vivi Vajda
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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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Hirnantian (latest Ordovician) bio- and chemostratigraphy of the Stirnas-18 core, western Latvia [PDF]
Estonian Journal of Earth Sciences, 2010 Integrated study of the uppermost Ordovician Porkuni Stage in the Stirnas-18 core, western Latvia, has revealed one of the most complete Hirnantian successions in the eastern Baltic region.
Hints, Linda +6 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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, 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
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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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