Results 21 to 30 of about 2,095 (187)
The earliest known stromatoporoid and its contribution to reef construction [PDF]
Estonian Journal of Earth Sciences, 2023 Stromatoporoid-type hypercalcified sponges are known to have contributed to the global reef system since the late Middle Ordovician until their major disappearance in the latest Devonian.
Juwan Jeon +6 more
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The earliest cornulitid on the internal surface of the illaenid pygidium from the Middle Ordovician of Estonia [PDF]
Estonian Journal of Earth Sciences, 2017 The earliest cornulitid Cornulites sp. appears in the Darriwilian (Lasnamägi Regional Stage) of Estonia. Internal annulation is present in all Middle Ordovician cornulitids and could be a plesiomorphic character for the group.
Olev Vinn, Ursula Toom, Mare Isakar
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The tarphyceratid cephalopod Trocholites in the Middle–Upper Ordovician of the Prague Basin —the Baltican element in peri-Gondwana [PDF]
Acta Palaeontologica Polonica, 2023 The vast majority of cephalopods of the order Tarphyceratida are known from regions that were located at mid- or low palaeolatitudes during the Ordovician (mainly Baltica, Laurentia, and Chinese palaeoblocks).
Martina Aubrechtová +2 more
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Late Ordovician Palynomorphs [PDF]
Journal of Micropalaeontology, 1985 Abstract. ACRITARCHSOrdovician acritarchs have been recorded in five core samples collected between 2520 ft. and 3000 ft. in Well E1-81, and ten cutting samples taken between 12150 ft. and 13240 ft. in Well J1-81A. All the assemblages recovered are of Late Ordovician age; no Early Ordovician or Middle Ordovician assemblages have been identified ...
Molyneux, S. G., Paris, F.
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Putative Late Ordovician land plants [PDF]
New Phytologist, 2018 The colonization of early terrestrial ecosystems by embryophytes (i.e. land plants) irreversibly changed global biogeochemical cycles (Berner & Kothavala, 2001; Berner et al., 2007; Song et al., 2012). However, when and how the process of plant terrestrialization took place is still intensely debated (Kenrick & Crane, 1997; Kenrick et al., 2012 ...
Salamon, Mariusz +11 more
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Scientific Reports, 2022 The Early Ordovician is a key interval for our understanding of the evolution of life on Earth as it lays at the transition between the Cambrian Explosion and the Ordovician Radiation and because the fossil record of the late Cambrian is scarce.
Farid Saleh +12 more
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Was there more space in the late Early Devonian for marine biodiversity to peak than in the early Late Ordovician?: A brief note [PDF]
Geološki Anali Balkanskoga Poluostrva, 2013 After the so-called “Cambrian explosion”, marine biodiversity peaked either in the early Late Ordovician (as shown by the “classical” curves based on the extensive palaeontological data compilation) or in the late Early Devonian (as shown by the
Ruban Dmitry A.
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Impact of global climate cooling on Ordovician marine biodiversity
Nature Communications, 2023 Global cooling has been proposed as a driver of the Great Ordovician Biodiversification Event, the largest radiation of Phanerozoic marine animal Life.
Daniel Eliahou Ontiveros +5 more
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New Late Ordovician cornulitids from Peru [PDF]
Bulletin of Geosciences, 2016 Peer ...
Vinn, Olev, Gutiérrez-Marco, J. C.
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Lower Palaeozoic source rocks in Manjiaer Sag, Tarim Basin
Petroleum Exploration and Development, 2008 Considering its vertical distribution characteristics, this article argues that the Lower Palaeozoic source rock in the Manjieer Sag is composed of three sets of source rocks of Middle-Lower Cambrian, Middle-Lower Ordovician, and Upper Ordovician.
Meng-jun ZHAO +5 more
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