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New Data on Biostratigraphy of the Volgian Stage Lectostratotype near the Gorodishche Village (Middle Volga Region)статья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 декабря 2013 г.
- Авторы: Vishnevskaya V.S., Baraboshkin E.Yu
- Журнал: Stratigraphy and Geological Correlation
- Том: 9
- Номер: 5
- Год издания: 2001
- Издательство: Pleiades Publishing, Inc.
- Местоположение издательства: New York, USA
- Первая страница: 491
- Последняя страница: 500
- Аннотация: A thorough revision of.the lectostratotype of the Volgian Stage near the Gorodishche Village (Ul'yanovsk region) and neighboring section of the upper Kimmeridgian-lower Volgian (Dubki Village) revealed the radiolarian assemblage with Parvicingula jonesi corresponding to the cymodoce and eudoxus ammonite zones. The radiolarian assemblage from the lower Volgian klimovi ammonite zone is dominated by Parvicirlgula blowi. Representatives of the genus Parvicingula prevail also in the sokolovi and pseudoscythica zones. The uppermost middle Volgian Zurajskites zarajskensis Zone and the Dorsoplanites pa~lderi Zone contain the diverse radiolarian assemblage with Pan~icingulah aeckeli. The late Volgian radiolarian assemblage from the subditus ammonite zone includes abundant Stichocapsa devorata and is close to that from coeval sediments of the North Sea. In contrast to Kimmeridgian-Xthonian radiolarian assemblages of the Caucasus, the studied assemblages are of the boreal type. The Krgatites gerassinlovi Zone is established and the scope of the Krgatites virgatus and Epivir-gatites rlikitirli zones of the middle Volgian Substage is specified. The upper Volgian Kachplirites fulgerls Zone is subdivided into subzones. The thorough study of the phosphorite horizon at the boundary between Volgian and Hauterivian stages did not confirm the presence of the upper Berriasian and lower Valanginian fossils even in the redeposited state.
- Добавил в систему: Барабошкин Евгений Юрьевич