Results 31 to 40 of about 2,587 (213)
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
doaj +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, 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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
Geologicheskii vestnik, 2021 The average values of the chemical index of alteration (CIA) for clayey rocks of a number of lithostratigraphic units of the Riphean stratotype are compared with the CIA values known in the literature for the sediments of modern large rivers of different
A. Maslov, I. Ras
semanticscholar +1 more source
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
doaj +1 more source
Advances in Geology, Volume 2015, Issue 1, 2015., 2015 In the different varieties of crystalline basement of Archean and Proterozoic age and in Vendian (Ediacaran) basal layers of platform coverture in the Central Basin of the Dniester River were found relatively high concentrations of Lanthanum, Cerium, Yttrium, Ytterbium, and Scandium.
Aurelia Popuiac, Giovanni Martinelli
wiley +1 more source
Journal of Geological Research, Volume 2012, Issue 1, 2012., 2012 This faulting tectonics analysis concerns the southernmost segment of the Dahomeyide Orogen and the West‐African craton eastern margin in southeast Ghana. The analysis of strike‐slip faults in the frontal units of the Dahomeyide Belt indicates that four distinct compressive events (NE‐SW, ENE‐WSW to E‐W, ESE‐WNW to SE‐NW and SE‐NW to SSE‐NNW ...
Mahaman Sani Tairou +4 more
wiley +1 more source