Results 31 to 40 of about 64,869 (244)
Fine characterization of Ordovician inner fault-controlled bodies in area A of Tarim Basin
Youqi dizhi yu caishoulu, 2023 It is a major difficulty to accurately characterize the inner fault-controlled bodies in the exploration and development of fault-controlled oil and gas reservoirs because the fault-controlled bodies are diverse in reservoir space， complicated in ...
YANG Xinrui +3 more
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Upper Ordovician hardgrounds – from localized surfaces to global biogeochemical events [PDF]
Estonian Journal of Earth Sciences, 2023 Upper Ordovician hardgrounds display a spectrum of complexity reflecting a range of local to global-scale processes. Hardgrounds are cemented seafloor surfaces typically marked by the presence of encrusting taxa and borings.
Timothy R. Paton +4 more
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Shiyou shiyan dizhi, 2023 From the eastern to the western part of Shunbei area in the Tarim Basin, the accumulations of marine oil and gas obviously decrease with the exploration risks significantly increasing.
Lixin QI, Yong DING
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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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A Cambrian–Ordovician Terrestrialization of Arachnids [PDF]
Frontiers in Genetics, 2020 Understanding the temporal context of terrestrialization in chelicerates depends on whether terrestrial groups, the traditional Arachnida, have a single origin and whether or not horseshoe crabs are primitively or secondarily marine. Molecular dating on a phylogenomic tree that recovers arachnid monophyly, constrained by 27 rigorously vetted fossil ...
Jesus Lozano-Fernandez +8 more
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Shiyou shiyan dizhi, 2023 In recent years, some progress has been made in the exploration of Ordovician natural gas in the western Ordos Basin, among which, the Ordovician Kelimoli Formation has the highest degree of natural gas accumulation.
Huimin LI +7 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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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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