Echinoderm Lagerstätten from high-latitude Gondwana – filling the gap in the Ordovician diversification of the phylum [PDF]
Estonian Journal of Earth Sciences, 2023 The phylum Echinodermata is a major component of marine ecosystems since the first appearance of echinoderms in the Cambrian. Like other metazoan phyla, echinoderms underwent two major evolutionary pulses in early Palaeozoic times: the Cambrian Explosion
Martina Nohejlová +4 more
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Changes in shelf phosphorus burial during the Hirnantian glaciation and its implications [PDF]
Estonian Journal of Earth Sciences, 2023 The Late Ordovician mass extinction occurred during an icehouse interval, accompanied by the glaciation of the supercontinent Gondwana, which was located at the South Pole at that time.
Johann Müller +4 more
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An Ordovician ostracod palaeopsychrosphere? [PDF]
Estonian Journal of Earth Sciences, 2023 Ostracods are tiny bivalved crustaceans with a fossil record extending into rocks of the Lower Ordovician. They occupy almost all aquatic environments today, from the ocean abyssal planes to damp forest leaf litter.
Anna McGairy +6 more
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Ordovician scientometrics [PDF]
Estonian Journal of Earth Sciences, 2023 Scientometrics is a tool for studying the development of science to observe and analyse patterns that emerge from it. Our aim is to elucidate how the Ordovician has been studied through the years, through the perspective of the published papers, the main
Alysson Mazoni +2 more
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The Ordovician System: From overlapping unit stratotypes to Global Boundary Stratotype Sections and Points [PDF]
Estonian Journal of Earth Sciences, 2023 For nearly a century the Ordovician System was hidden as Murchison and Sedgwick tussled over the overlapping ground between their Silurian and Cambrian systems.
David A. T. Harper +2 more
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Oil and gas sources in Shunbei Oilfield, Tarim Basin
Shiyou shiyan dizhi, 2020 The hydrocarbon sources in the Middle and Lower Ordovician in the Shunbei area of the Tarim Basin were studied based on the geochemical characteristics of oil and gas samples.
Rong GU, Lu YUN, Xiuxiang ZHU, Meng ZHU
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Early Tremadocian graptolites from the Arivechi area, Sonora, northern Mexico [PDF]
Estonian Journal of Earth Sciences, 2023 Graptolites from the early Tremadocian Anisograptus matanensis Biozone are identified from east-central Sonora, northwestern Mexico, within a carbonate-shelf succession deposited on the southwestern continental shelf margin of Laurentia.
Dulce Raquel Reyes-Montoya +5 more
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The Evae transgression: a major event? [PDF]
Estonian Journal of Earth Sciences, 2023 The most extensive sea-level event of the Early Ordovician is known as the Evae transgression. During the highstand of this event, the conodont index species Oepikodus evae reached its acme and often coincided with the peak in conodont generic diversity.
Gisella M. Della Costa +1 more
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Ordovician collections stored at the National Museum of Natural History of the NAS of Ukraine [PDF]
Estonian Journal of Earth Sciences, 2023 We reviewed our departmentâs collections dealing with the Ordovician System, stored at the National Museum of Natural History of the National Academy of Sciences of Ukraine (NMNH NAS).
Galyna Anfimova, Volodymyr Grytsenko
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Late Ordovician gastropods from the Zhaolaoyu Formation in the southwestern margin of the North China Platform [PDF]
Estonian Journal of Earth Sciences, 2023 The Ordos Basin is located in the western part of the North China Platform and is the second largest sedimentary basin in China; the basin has a huge thickness of the Early Palaeozoic marine deposits, especially the Ordovician ones.
Rao Fu +6 more
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