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
doaj
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
Late Ordovician (Hirnantian) scolecodont clusters from the Soom Shale Lagerstätte, South Africa [PDF]
Journal of Micropalaeontology, 2008 Abstract. More than 20 partial scolecodont clusters were recovered from the Soom Shale Lagerstätte, South Africa. The specimens were found in association with chitinozoans, algae, conodont apparatuses and the enigmatic needle-like fossil Siphonacis. The Family Xanioprionidae is identified and the species Xanioprion? n. sp. is distinguished.
Whittle, Rowan +3 more
openaire +3 more sources
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
Carbon isotope chemostratigraphy of the Llandovery in northern peri-Gondwana: new data from the Barrandian area, Czech Republic [PDF]
Estonian Journal of Earth Sciences, 2014 The first complete δ13Corg record of the uppermost Hirnantian to lower Telychian strata of the Barrandian area (northern peri-Gondwana) is presented based on 168 new samples.
Jiří Frýda, Petr Štorch
doaj +1 more source
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