Results 11 to 20 of about 876 (195)
Marine Anoxia and Ocean Acidification During the End‐Permian Extinction
Geophysical Monograph Series, Page 325-340., 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.
Ying Cui +4 more
wiley +4 more sources
Anais da Academia Brasileira de Ciências, 2007 Specimens of Recent foraminifera of Amphistegina radiata, Peneroplis planatus and Globigerinoides ruber, from fifty samples of surface sediments of the continental margin of the State of Ceará, Brazil, have been analyzed for carbon and oxygen isotopes to
Wanessa S. Marques +4 more
doaj +1 more source
Phenotypic Evolution in a Cretaceous Foraminifer [PDF]
Evolution, 1982 Statistically well-documented sequences of fossil species are rare, as has been observed, for example, by Eldredge and Gould (1972), Boucot (1978) and Dodson and Hallam (1977). Rapid advances in theoretical paleontology made over the last few years have, however, made it imperative that the many new and exciting theories we now have at our disposal be ...
openaire +2 more sources
The Middle Carboniferous Boundary in the North of Pay-Khoy – Correlation between the Shallow- and Deep-Water Sequences [PDF]
Учёные записки Казанского университета: Серия Естественные науки, 2017 The paper considers the Lower-Middle Carboniferous boundary interval in the sections of the Pay-Khoy carbonate parautochthone (shallow-water facies) and the Kara slate allochthone (deep-water facies) with respect to the boundary tracing criteria.
A.V. Zhuravlev, Ya.A. Vevel
doaj
Journal of Palaeogeography, 2015 An integrated study of borehole data and outcrop of Mississippian (late Tournaisian to late Viséan) rocks in Co. (County) Galway, western Ireland has enabled a more detailed geological map and lithostratigraphy to be constructed for the region.
Markus Pracht, Ian D. Somerville
doaj +1 more source
New robertinid foraminifers from the Early Jurassic of Adnet, Austria and their evolutionary importance [PDF]
Acta Palaeontologica Polonica, 2016 New benthic multichambered foraminifers have been discovered in the Hettangian–Sinemurian of the Northern Calcareous Alps (Adnet, Salzburg, Austria). Originally aragonitic, these forms are completely recrystallized but the early impregnation of their ...
Sylvain Rigaud, Joachim Blau
doaj +1 more source
Nature, 1871 I CHANCED upon an aberrant form of Peneroplis the other day, in which the free terminal series of chambers of this Foraminifer, ordinarily single, is constricted into two distinct tubes.
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Evidence for complete denitrification in a benthic foraminifer [PDF]
Nature, 2006 Benthic foraminifera are unicellular eukaryotes found abundantly in many types of marine sediments. Many species survive and possibly reproduce in anoxic habitats, but sustainable anaerobic metabolism has not been previously described. Here we demonstrate that the foraminifer Globobulimina pseudospinescens accumulates intracellular nitrate stores and ...
Risgaard-Petersen, N. +12 more
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Geologica Carpathica, 2017 Thorough study of foraminifers, ostracods and dinoflagellate remnants from the Zavodskaya Balka and Koklyuk sections helps to characterize the detailed biostratigraphic division of the Berriasian / Valanginian boundary sequence in the Feodosiya district ...
Savelieva Yuliya N. +4 more
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Литосфера, 2020 Research subject. The choice of the marker and the GSSP (Global Boundary Stratotype Section and Point) of the base of the Serpukhovian is currently one of the most urgent tasks of international stratigraphy.
E. I. Kulagina, E. Yu. Bashlykova
doaj +1 more source