Ooid-stromatolite association - a stress for benthic ecosystems
This study reports the occurrence of ooid-stromatolite association (0,5-9 m in thickness) in the Lower Paleozoic sections of the Timan-northern Ural region. Well-preserved different fabrics seen in ancient ooids and stromatolites have previously been interpreted with respect to paleoenvironmental co...
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| Format: | Article |
| Language: | Russian |
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Sergo Ordzhonikidze Russian State University for Geological Prospecting
2015-06-01
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| Series: | Известия высших учебных заведений: Геология и разведка |
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| Online Access: | https://www.geology-mgri.ru/jour/article/view/39 |
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| author | A. I. Antoshkina |
| author_facet | A. I. Antoshkina |
| author_sort | A. I. Antoshkina |
| collection | DOAJ |
| description | This study reports the occurrence of ooid-stromatolite association (0,5-9 m in thickness) in the Lower Paleozoic sections of the Timan-northern Ural region. Well-preserved different fabrics seen in ancient ooids and stromatolites have previously been interpreted with respect to paleoenvironmental conditions which brought changes in benthic ecosystems. Results from current study suggest that it is possible that the connection of ooids with stromatolites at the time-levels depends on their genetic relationship due to abundance of microbial inhabits during periods of shallow water marine basin regressions. During regression in the result of further paleolandscape differentiation of the bottom the hydrochemical and hydrodynamic regimes of the water reservoir changed. It lead to the quiet-water environments, expansion of microbe and bacterial associations and eutrophy of waters, calcium balance of sea waters fall and reorganization of benthos ecosystems with dominance of mostly euryfacial and euryhaline organisms - Ostracods, gastropods and bivalves. Bulk carbonate values from the Wenlock limestones with ooids average -5,4...-6,4% for S13C PDB and 22,9...24,6% for S18O SNOW. Additionally, a low content of boron 11-30g/t in these limestones also indicates the lowered salinity of waters. |
| format | Article |
| id | doaj-art-6a6e22edbe0e4efab7d737d5923c92e8 |
| institution | Kabale University |
| issn | 0016-7762 2618-8708 |
| language | Russian |
| publishDate | 2015-06-01 |
| publisher | Sergo Ordzhonikidze Russian State University for Geological Prospecting |
| record_format | Article |
| series | Известия высших учебных заведений: Геология и разведка |
| spelling | doaj-art-6a6e22edbe0e4efab7d737d5923c92e82025-08-20T03:57:48ZrusSergo Ordzhonikidze Russian State University for Geological ProspectingИзвестия высших учебных заведений: Геология и разведка0016-77622618-87082015-06-0103192510.32454/0016-7762-2015-3-19-2539Ooid-stromatolite association - a stress for benthic ecosystemsA. I. Antoshkina0Institute of Geology, Komi Science Centre, Ural Branch, Russian Academy of Sciences; Institute of Natural Sciences, Pitirim Sorokin Syktyvkar State UniversityThis study reports the occurrence of ooid-stromatolite association (0,5-9 m in thickness) in the Lower Paleozoic sections of the Timan-northern Ural region. Well-preserved different fabrics seen in ancient ooids and stromatolites have previously been interpreted with respect to paleoenvironmental conditions which brought changes in benthic ecosystems. Results from current study suggest that it is possible that the connection of ooids with stromatolites at the time-levels depends on their genetic relationship due to abundance of microbial inhabits during periods of shallow water marine basin regressions. During regression in the result of further paleolandscape differentiation of the bottom the hydrochemical and hydrodynamic regimes of the water reservoir changed. It lead to the quiet-water environments, expansion of microbe and bacterial associations and eutrophy of waters, calcium balance of sea waters fall and reorganization of benthos ecosystems with dominance of mostly euryfacial and euryhaline organisms - Ostracods, gastropods and bivalves. Bulk carbonate values from the Wenlock limestones with ooids average -5,4...-6,4% for S13C PDB and 22,9...24,6% for S18O SNOW. Additionally, a low content of boron 11-30g/t in these limestones also indicates the lowered salinity of waters.https://www.geology-mgri.ru/jour/article/view/39ooid-stromatolite associationsbenthosquiet-water environmentslower paleozoic |
| spellingShingle | A. I. Antoshkina Ooid-stromatolite association - a stress for benthic ecosystems Известия высших учебных заведений: Геология и разведка ooid-stromatolite associations benthos quiet-water environments lower paleozoic |
| title | Ooid-stromatolite association - a stress for benthic ecosystems |
| title_full | Ooid-stromatolite association - a stress for benthic ecosystems |
| title_fullStr | Ooid-stromatolite association - a stress for benthic ecosystems |
| title_full_unstemmed | Ooid-stromatolite association - a stress for benthic ecosystems |
| title_short | Ooid-stromatolite association - a stress for benthic ecosystems |
| title_sort | ooid stromatolite association a stress for benthic ecosystems |
| topic | ooid-stromatolite associations benthos quiet-water environments lower paleozoic |
| url | https://www.geology-mgri.ru/jour/article/view/39 |
| work_keys_str_mv | AT aiantoshkina ooidstromatoliteassociationastressforbenthicecosystems |