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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ORDOVICIAN (DARRIWILIAN–KATIAN) BRACHIOPODS FROM THE SOUTHEASTERN MARGIN OF AVALONIA (CONDROZ INLIER, BELGIUM) [PDF]
Rivista Italiana di Paleontologia e StratigrafiaA low-diversity, relatively well-preserved brachiopod fauna is documented in detail for the first time from the Sandbian–Katian (Upper Ordovician) siliciclastic rocks of the Oxhe Inlier (Belgium), i.e.
Yves Candela +2 more
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Redefinition of the Sandbian–lower Katian conodont biozonation of Baltoscandia
Geological MagazineAbstract Recent development in the Upper Ordovician conodont biostratigraphy of Baltoscandia highlights the mismatch between the traditionally used conodont zonation and ranges of the eponymous species. Practical application of the zonation is further complicated by the fact that the morphology of the long-ranging species Amorphognathus tvaerensis ...
Tõnn Paiste +4 more
openaire +3 more sources
δ13C chemostratigraphy in the upper Tremadocian through lower Katian (Ordovician) carbonate succession of the Siljan district, central Sweden [PDF]
Estonian Journal of Earth Sciences, 2014 Based on δ13C data from two drillcores recovered from the Siljan district, we present a first continuous carbon isotope record of the upper Tremadocian–lower Katian limestone succession of central Sweden.
Oliver Lehnert +4 more
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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 +3 more sources
Changes in the morphology of Late Ordovician ostracods along the shelf-to-basin transect of the Baltic Palaeobasin [PDF]
Estonian Journal of Earth Sciences, 2022 The present work analyses the numerical distribution data of ostracods in the Late Ordovician (Katian) deposits of Estonia for establishing trends in carapace morphology along a facies profile from a shallow shelf to a deep basin.
Stefi Guitor, Tõnu Meidla
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The Late Ordovician extinction conundrum [PDF]
Estonian Journal of Earth Sciences, 2023 The Late Ordovician mass extinction (LOME) has long been known for its association with the Hirnantian glaciations. Two extinction pulses seem to reflect global cooling and warming, respectively. The effects climate change had on Ordovician life are well
Christian M. Ø. Rasmussen
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Late Ordovician beachrock as a far-field indicator for glacial meltwater pulse [PDF]
Estonian Journal of Earth Sciences, 2023 Understanding ancient climate changes is hampered by the inability to disentangle trends in continental ice volume from records of relative sea-level change. As a unique coastal deposit in tropical and subtropical regions, beachrock has been proved to be
Qijian Li +5 more
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A diverse Hirnantian scolecodont assemblage from northern Estonia and resilience of polychaetes to the end-Ordovician mass extinction [PDF]
Estonian Journal of Earth Sciences, 2023 We report the discovery of a rich assemblage of latest Katian and Hirnantian scolecodonts (polychaete jaws) from a new OrdovicianâSilurian boundary outcrop in the Reinu quarry, northern Estonia.
Olle Hints, Petra Tonarová
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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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