New data on acritarchs from the Upper Ordovician of the Tungus basin, Siberian platformстатья
Статья опубликована в журнале из списка Web of Science и/или Scopus
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Авторы:
Raevskaya E.,
Dronov A.
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Журнал:
Estonian Journal of Earth Sciences
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Том:
63
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Номер:
4
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Год издания:
2014
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Издательство:
Estonian Academy Publishers
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Местоположение издательства:
Estonia
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Первая страница:
300
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Последняя страница:
304
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DOI:
10.3176/earth.2014.34
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Аннотация:
Distinctive late Ordovician acritarch assemblages have been discovered for the first time from about a 100 m sedimentary succession exposed along the Bol′shaya Nirunda River in Siberia. The studied stratigraphic interval includes the uppermost Baksian, Dolborian, Nirundian and Burian regional stages, which correspond to the Katian-?lowermost Hirnantian global stages. Acritarch assemblages from the Dolbor Regional Stage are exceptionally diverse and include aside from the longranging taxa several unique (endemic) morphotypes and a number of distinctive stratigraphically valuable species, well known outside Siberia. The occurrence of the acritarchs widespread outside Siberia is potentially important for interregional biostratigraphic correlations and might also play a significant role in biogeographic reconstructions. Having in mind that the Siberian palaeocontinent was located in a low-latitude tropical area during the entire Ordovician, the presence of taxa typical of cold-water settings along the Peri-Gondwana margin can be regarded as an additional evidence for penetration of cool-water currents into the epicontinental Tungus basin in the Upper Ordovician. © 2014, Estonian Academy Publishers. All rights reserved.
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Добавил в систему:
Дронов Андрей Викторович