Subfossil freshwater bivalve mollusk shells present data on stratigraphy of Dniester and Prut riverine deposits
The article provides information on the outcrops of the Neogene-Quaternary riverine sediments of the North-Western Black Sea coastal area. A description of five outcrops of fluvial deposits located on the territory of the modern basins of the Dniester and Prut rivers is given. Based on the granulome...
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Northern (Arctic) Federal University named after M.V. Lomonosov
2019
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Online Access: | https://doi.org/10.3897/issn2541-8416.2019.19.2.65 |
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ftzenodo:oai:zenodo.org:3334071 2024-09-15T17:50:07+00:00 Subfossil freshwater bivalve mollusk shells present data on stratigraphy of Dniester and Prut riverine deposits Lyubas, AA Obada, TF Ortiz, JE Torres, T Kriauciunas, VV Nicoara, IN Gofarov, MYu 2019-07-05 https://doi.org/10.3897/issn2541-8416.2019.19.2.65 unknown Northern (Arctic) Federal University named after M.V. Lomonosov https://zenodo.org/communities/biosyslit https://doi.org/10.3897/issn2541-8416.2019.19.2.65 oai:zenodo.org:3334071 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Arctic Environmental Research, 19((2)), 65-74, (2019-07-05) subfossil shells freshwater bivalve mollusks aminostratigraphy riverine deposits geological age info:eu-repo/semantics/article 2019 ftzenodo https://doi.org/10.3897/issn2541-8416.2019.19.2.65 2024-07-26T13:49:31Z The article provides information on the outcrops of the Neogene-Quaternary riverine sediments of the North-Western Black Sea coastal area. A description of five outcrops of fluvial deposits located on the territory of the modern basins of the Dniester and Prut rivers is given. Based on the granulometric composition of the sediments and the presence in them of the fossil shells of freshwater bivalve mollusks (Bivalvia: Unionoida), an assumption has been made about the characteristics of the ancient river ecosystems of the Dniester and Prut on different Pliocene and Pleistocene time sections. A review of the data in the body of literature on the geological age of the studied outcrops was undertaken. The localities considered provide information on the sedimentation conditions in this region from the Pliocene to the Late Pleistocene. Previously, various approaches were used for dating such rocks and for determining the stratigraphic position of fossil material found in them. The article considers the method of amino acids racemization as one of the approaches. Racemization allows to obtain new data on the stratigraphy of Neogene-Quaternary riverine sediments and to solve the problem of their dating. The sampling principles of carbonate material for the analysis of amino acids from the mollusk shells and features of sample preparation are described. Five amino acids were used: aspartic acid (Asp), glutamic acid (Glu), leucine (Leu), phenylalanine (Phe) and isoleucine (Ile). The D/L ratios were analyzed (amino acid racemization (or AAR) is the interconversion of amino acids from one chiral form (the L – (laevo) amino acids which are the building blocks of proteins) to a mixture of L- and D- (dextro) forms. The extent of racemization is measured by the ratio of D/L isomers (it increases as a function of time and temperature and can be used for geochronology) from the same group of fossils (genera), which were preserved under similar environmental conditions, inorganic geochemistry and thermal histories. Based on the ... Article in Journal/Newspaper Arctic Zenodo Arctic Environmental Research 19 2 65 74 |
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topic |
subfossil shells freshwater bivalve mollusks aminostratigraphy riverine deposits geological age |
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subfossil shells freshwater bivalve mollusks aminostratigraphy riverine deposits geological age Lyubas, AA Obada, TF Ortiz, JE Torres, T Kriauciunas, VV Nicoara, IN Gofarov, MYu Subfossil freshwater bivalve mollusk shells present data on stratigraphy of Dniester and Prut riverine deposits |
topic_facet |
subfossil shells freshwater bivalve mollusks aminostratigraphy riverine deposits geological age |
description |
The article provides information on the outcrops of the Neogene-Quaternary riverine sediments of the North-Western Black Sea coastal area. A description of five outcrops of fluvial deposits located on the territory of the modern basins of the Dniester and Prut rivers is given. Based on the granulometric composition of the sediments and the presence in them of the fossil shells of freshwater bivalve mollusks (Bivalvia: Unionoida), an assumption has been made about the characteristics of the ancient river ecosystems of the Dniester and Prut on different Pliocene and Pleistocene time sections. A review of the data in the body of literature on the geological age of the studied outcrops was undertaken. The localities considered provide information on the sedimentation conditions in this region from the Pliocene to the Late Pleistocene. Previously, various approaches were used for dating such rocks and for determining the stratigraphic position of fossil material found in them. The article considers the method of amino acids racemization as one of the approaches. Racemization allows to obtain new data on the stratigraphy of Neogene-Quaternary riverine sediments and to solve the problem of their dating. The sampling principles of carbonate material for the analysis of amino acids from the mollusk shells and features of sample preparation are described. Five amino acids were used: aspartic acid (Asp), glutamic acid (Glu), leucine (Leu), phenylalanine (Phe) and isoleucine (Ile). The D/L ratios were analyzed (amino acid racemization (or AAR) is the interconversion of amino acids from one chiral form (the L – (laevo) amino acids which are the building blocks of proteins) to a mixture of L- and D- (dextro) forms. The extent of racemization is measured by the ratio of D/L isomers (it increases as a function of time and temperature and can be used for geochronology) from the same group of fossils (genera), which were preserved under similar environmental conditions, inorganic geochemistry and thermal histories. Based on the ... |
format |
Article in Journal/Newspaper |
author |
Lyubas, AA Obada, TF Ortiz, JE Torres, T Kriauciunas, VV Nicoara, IN Gofarov, MYu |
author_facet |
Lyubas, AA Obada, TF Ortiz, JE Torres, T Kriauciunas, VV Nicoara, IN Gofarov, MYu |
author_sort |
Lyubas, AA |
title |
Subfossil freshwater bivalve mollusk shells present data on stratigraphy of Dniester and Prut riverine deposits |
title_short |
Subfossil freshwater bivalve mollusk shells present data on stratigraphy of Dniester and Prut riverine deposits |
title_full |
Subfossil freshwater bivalve mollusk shells present data on stratigraphy of Dniester and Prut riverine deposits |
title_fullStr |
Subfossil freshwater bivalve mollusk shells present data on stratigraphy of Dniester and Prut riverine deposits |
title_full_unstemmed |
Subfossil freshwater bivalve mollusk shells present data on stratigraphy of Dniester and Prut riverine deposits |
title_sort |
subfossil freshwater bivalve mollusk shells present data on stratigraphy of dniester and prut riverine deposits |
publisher |
Northern (Arctic) Federal University named after M.V. Lomonosov |
publishDate |
2019 |
url |
https://doi.org/10.3897/issn2541-8416.2019.19.2.65 |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Arctic Environmental Research, 19((2)), 65-74, (2019-07-05) |
op_relation |
https://zenodo.org/communities/biosyslit https://doi.org/10.3897/issn2541-8416.2019.19.2.65 oai:zenodo.org:3334071 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.3897/issn2541-8416.2019.19.2.65 |
container_title |
Arctic Environmental Research |
container_volume |
19 |
container_issue |
2 |
container_start_page |
65 |
op_container_end_page |
74 |
_version_ |
1810291968564002816 |