Results 31 to 40 of about 14,488 (288)
Modern planktic foraminifers in the high-latitude ocean
, 2017 Planktic foraminifers can be sensitive indicators of the changing environment including both the Arctic Ocean and Southern Ocean. Due to variability in their ecology, biology, test characteristics, and fossil preservation in marine sediments, they serve ...
R. Schiebel +12 more
semanticscholar +1 more source
Journal of Palaeogeography, 2013 The northern flank of the Tindouf Syncline in southern Morocco exhibits a continuous, well exposed Carboniferous succession with limestones of Late Asbian to Early Bashkirian age containing rich and diverse foraminiferal and rugose coral assemblages ...
Ian D. Somerville +5 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
, 2018 We describe a new Maastrichtian species of the benthic foraminifer Elazigina siderea from Tarbur Formation. Its main characters are the presence of heavy feathered umbilical sutures, a wide umbilical plug, and umbilical piles.
L. Consorti, K. Rashidi
semanticscholar +1 more source
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
Geologica Carpathica, 2018 Detail results of microfaunal, sedimentological and geochemical investigations are documented from a newly discovered section of the Permian–Triassic boundary (PTB) interval in the area of the town of Valjevo (northwestern Serbia).
Sudar Milan N. +7 more
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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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The Cretaceous/Paleogene (K/Pg) boundary in the Mezdra and Lyutidol syncline, Vratza District (West-Fore Balkan, Bulgaria) [PDF]
Geološki Anali Balkanskoga Poluostrva, 2006 This paper discusses the unjustified assignment (based on calcareous nannofossils) of a large portion of the Maastrichtian strata in the Mezdra and Lyutidol synclines (West Fore Balkan, Bulgaria) to the Paleogene.
Jolkičev Nikola A.
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Известия высших учебных заведений: Нефть и газ, 2018 At the present stage of the development of geological sciences more detailed lithological and petrographic studies become more important. Microscopic studies of core material in the Upper Taurus substage made it possible to isolate the lithotypes of ...
I. P. Zinatulluna, L. B. Kadyrova
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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.
openaire +2 more sources