Results 21 to 30 of about 1,084 (191)
The ‘classic stromatolite’ Cryptozoön is a keratose sponge‐microbial consortium
Geobiology, Volume 19, Issue 2, Page 189-198, March 2021., 2021 Abstract Animal evolution transformed microbial mat development. Canonically inferred negative effects include grazing, disturbance and competition for space. In contrast, ancient examples of cooperation between microbial mats and invertebrates have rarely been reported.
Jeong‐Hyun Lee, Robert Riding
wiley +1 more source
The astronomical pulse of global extinction events. [PDF]
ScientificWorldJournal, 2006 The linkage between astronomical cycles and the periodicity of mass extinctions is reviewed and discussed. In particular, the apparent 26 million year cycle of global extinctions may be related to the motion of the solar system around the galaxy, especially perpendicular to the galactic plane.
Lewis DF, Dorne JL.
europepmc +2 more sources
Литосфера, 2020 Research subject. This article considers accessory minerals, which, unlike zircons, are present in the vast majority of common clastic rocks. Materials and methods.
L. V. Badida, A. V. Maslov, G. A. Mizens
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Геодинамика и тектонофизика, 2022 This paper presents the results of petrographic, lithogeochemical, and U-Pb geochronological studies of detrital zircons in deep core sediments from the Vendian terrigenous sequences of the Nepa and Tira formations in the interior of the Siberian ...
Z. L. Motova, A. V. Plyusnin
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Provenance reconstructions. Article 2. Litho- and isotope-geochemical approaches and methods
Литосфера, 2020 Research subject. In this paper, we consider specific features of the use of litho- and isotopic-geochemical data for the purposes of provenance reconstruction.Methods and materials.
A. V. Maslov +4 more
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Геодинамика и тектонофизика, 2023 Studies have been made of the carbon and strontium isotope composition in carbonate sediments of the Khorbusuonka group and Kessyusa formation corresponding to the Upper Vendian in deep Khastakhskaya-930 and Burskaya-341-0 boreholes at the northeastern ...
B. B. Kochnev +2 more
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Литосфера, 2017 Earlier, we considered the features of the redox changes in the near-bottom layer of water in the sedimentation basins that existed during the Late Riphean and Vendian in the eastern and northeastern (in modern coordinates) margins of the Baltic.
Andrey V. Maslov, Viktor N. Podkovyrov
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Transactions of the Karelian Research Centre of the Russian Academy of Sciences, 2016 Water chemical and isotopic composition (deuterium content and oxygen-18), as well as the activity of tritium in groundwater of Riphean aquifer and Vendian complex in the Karelian Isthmus were studied.
Grigory Voroniuk +3 more
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THE NEPSKY-1 IMPACT CRATER AND ITS FILL DEPOSITS ON THE BASEMENT ROOF OF THE SIBERIAN PLATFORM
Геодинамика и тектонофизика, 2020 In the Earth studies, discoveries and investigations of impact craters buried beneath thick sediments are sporadic so far and may still remain inefficient, unless geophysical surveys of the areas of interest are initiated. Such studies can provide useful
M. I. Gyokche, A. V. Plyusnin
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Известия высших учебных заведений: Геология и разведка, 2020 Background. Clarification of the structure of sedimentary formations located on the Siberian Platform by means of lithological and petrographic core studies has a theoretical and practical significance for the creation of geological models for oil and ...
A. V. Plyusnin, M. I. Gyokche
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