Correspondence
The ecostratigraphic analysis of foraminiferal assemblages from Upper Pliens-bachian to Lower Toarcian (Lower Jurassic) mudstones, siltstones and black shales from northern Siberia allows for a better understanding of the response to the benthic biotic crisis related to the Toarcian Oceanic Anoxic E...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.640.3122 2023-05-15T15:03:27+02:00 Correspondence Boris L. Nikitenko Larissa Glinskikh The Pennsylvania State University CiteSeerX Archives http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.640.3122 http://www.polarresearch.net/index.php/polar/article/download/21653/pdf_1/ en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.640.3122 http://www.polarresearch.net/index.php/polar/article/download/21653/pdf_1/ Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.polarresearch.net/index.php/polar/article/download/21653/pdf_1/ colonization anoxic event ecostratigraphy black shale text ftciteseerx 2016-01-08T15:55:48Z The ecostratigraphic analysis of foraminiferal assemblages from Upper Pliens-bachian to Lower Toarcian (Lower Jurassic) mudstones, siltstones and black shales from northern Siberia allows for a better understanding of the response to the benthic biotic crisis related to the Toarcian Oceanic Anoxic Event in a high latitude context. The assemblages were dominated by agglutinated taxa with extremely low diversity values and dominance of Trochammina. These features suggest that the foraminiferal assemblages were adapted to restricted conditions, where the main limiting factors were salinity and oxygen degree. The opportunist behaviour of Trochammina enabled this genus to survive and adapt to unfavourable conditions. Trochammina proliferated in relation to the sea-level fall and probable changes in salinity in the Arctic palaeobasin during the Margaritatus Chron and at the beginning of the Viligaensis Chron (Late Pliensbachian). Another Trochammina proliferation is associated with the initial development of the restricted oxygen conditions related to the Toarcian Text Arctic Foraminifera* Siberia Unknown Arctic |
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Open Polar |
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ftciteseerx |
language |
English |
topic |
colonization anoxic event ecostratigraphy black shale |
spellingShingle |
colonization anoxic event ecostratigraphy black shale Boris L. Nikitenko Larissa Glinskikh Correspondence |
topic_facet |
colonization anoxic event ecostratigraphy black shale |
description |
The ecostratigraphic analysis of foraminiferal assemblages from Upper Pliens-bachian to Lower Toarcian (Lower Jurassic) mudstones, siltstones and black shales from northern Siberia allows for a better understanding of the response to the benthic biotic crisis related to the Toarcian Oceanic Anoxic Event in a high latitude context. The assemblages were dominated by agglutinated taxa with extremely low diversity values and dominance of Trochammina. These features suggest that the foraminiferal assemblages were adapted to restricted conditions, where the main limiting factors were salinity and oxygen degree. The opportunist behaviour of Trochammina enabled this genus to survive and adapt to unfavourable conditions. Trochammina proliferated in relation to the sea-level fall and probable changes in salinity in the Arctic palaeobasin during the Margaritatus Chron and at the beginning of the Viligaensis Chron (Late Pliensbachian). Another Trochammina proliferation is associated with the initial development of the restricted oxygen conditions related to the Toarcian |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Boris L. Nikitenko Larissa Glinskikh |
author_facet |
Boris L. Nikitenko Larissa Glinskikh |
author_sort |
Boris L. Nikitenko |
title |
Correspondence |
title_short |
Correspondence |
title_full |
Correspondence |
title_fullStr |
Correspondence |
title_full_unstemmed |
Correspondence |
title_sort |
correspondence |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.640.3122 http://www.polarresearch.net/index.php/polar/article/download/21653/pdf_1/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Foraminifera* Siberia |
genre_facet |
Arctic Foraminifera* Siberia |
op_source |
http://www.polarresearch.net/index.php/polar/article/download/21653/pdf_1/ |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.640.3122 http://www.polarresearch.net/index.php/polar/article/download/21653/pdf_1/ |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766335297777303552 |