FÓSILES: HISTORIA DE LA VIDA EN LA TIERRA
Epistemus, 2021 Por medio de los fósiles es posible conocer la historia de la vida en el pasado geológico del planeta Tierra. Es probable que la vida se originó a inicios del Precámbrico, hace más de 3800 millones de años, sin embargo, los restos fósiles más antiguos ...
Francisco Javier Cuen Romero +3 more
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The Silurian Section of the Valle syncline (Sierra Norte de Sevilla UNESCO Global Geopark, Spain) as an International Standard for Graptolite Biostratigraphy [PDF]
Geoconservation Research, 2021 The Paleozoic succession of the Sierra Norte de Sevilla UNESCO Global Geopark (Ossa Morena Zone of the Iberian Massif, SW Spain) includes a nearly complete Silurian succession, ca. 150 m thick, deposited in an outer shelf setting. In the core part of the
Juan Carlos Gutierrez-Marco +2 more
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On future directions of Ordovician chitinozoan research [PDF]
Estonian Journal of Earth Sciences, 2023 Chitinozoans have been known to science for nearly a century. Due to their biostratigraphic utility, chitinozoans were intensively studied from the 1960s to the 1980s, and they have an important place in Ordovician stratigraphy nowadays, alongside ...
Yan Liang +3 more
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Subway into the Ordovician (Prague Basin, Czech Republic) [PDF]
Estonian Journal of Earth Sciences, 2023 In the Late Ordovician, the Prague Basin was located at the high-latitude northwestern shelf of Gondwana. This period was characterised by profound environmental changes and ended by one of the most severe mass extinctions, which was caused by climatic ...
Jana Bruthansová +2 more
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Silurian myodocope ostracods from Poland [PDF]
Acta Palaeontologica Polonica, 2019 Newly collected material reveals that the Silurian myodocope ostracods from the Holy Cross Mountains, Poland comprise ten species (one new to science) belonging to four families: Bolbozoidae, Entomozoidae, Rhomboentomozoidae, and Cypridinidae ...
Vincent Perrier +4 more
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Advances in the Ordovician graptolite biostratigraphy of the St Petersburg area, Russia [PDF]
Estonian Journal of Earth Sciences, 2009 The Ordovician shallow-water shelf deposits rich in benthic fauna are exposed along the Russian part of the Baltic–Ladoga Klint. Graptolites occur only at some stratigraphic levels, being comparatively numerous in marls and clays and very rare in ...
Suyarkova, Anna A., Koren,Tatyana N.
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Running across the Silurian/Devonian Boundary along Northern Gondwana: A Conodont Perspective
Geosciences, 2022 The Global Stratotype Section and Point (GSSP) of the Silurian/Devonian boundary, Lower Devonian Series and Lochkovian Stage was formally placed in 1977 at Klonk, in the Czech Republic, at the first appearance of the graptolite Uncinatograptus uniformis ...
Annalisa Ferretti +3 more
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The Guluoping section and the understanding of the Stimulograptus sedgwickii graptolite Biozone on the South China Platform (Yangtze Platform) [PDF]
Swiss Journal of PalaeontologyThe uppermost Aeronian (Llandovery, Lower Silurian) Stimulograptus sedgwickii Biozone, as found in the Guluoping section, Hubei Province, China, and its correlation are discussed. This interval has rarely been recognized in China.
Chuanshang Wang +2 more
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The Ultrastructure and Building of Graptolite Dissepiments [PDF]
Acta Palaeontologica Polonica, 2009 Dissepiments or connecting bars between adjacent stipes in rhabdosomes of dendroid graptolites were studied by means of electron microscopy (SEM and TEM). The material, chemically isolated from rock matrix, originating from the Ordovician of Estonia and glacial boulders of Baltic origin found in Poland, is assigned provisionally to the genus ...
Urbanek, Adam, Mierzejewski, Piotr
openaire +2 more sources
The regional stratotype section and point for the base of the Hirnantian Stage (the uppermost Ordovician) at Mirny Creek, Omulev Mountains, Northeast Russia [PDF]
Estonian Journal of Earth Sciences, 2008 A complete Hirnantian sequence comprising the Normalograptus extraordinarius and N. persculptus biozones is well developed at the Mirny Creek section in the Omulev Mountains.
Koren, Tatyana N. +1 more
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