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STRATIGRAPHIC RANGES OF THE BAJOCIAN – BATHONIAN RETROCERAMUS ZONES ON THE YURYUNG-TUMUS PENINSULA (NORTH OF SIBERIA)

O. S. Urman, B. N. Shurygin, O. S. Dzyuba

A.A.Trofimuk Institute of Petroleum Geology and Geophysics SB RAS, Novosibirsk, Russia

The Yuryung-Tumus section (north of Siberia) is one of the reference sections for the development of biostratigraphic scale for bivalves for the boreal zonal standard of the Middle Jurassic. Based on the study of the Bajocian – Bathonian collections of bivalves of the Retroceramus genus collected in different years, the sequential series and age interpretation of Retroceramus zones in this section have been adjusted, taking into account modern ideas about the correlation of ammonite zones of the Bajocian – Bathonian interval of the boreal standard with subdivisions of the primary (international) Northwestern European zonal standard.

Keywords: bivalves, Retroceramus, Middle Jurassic, biostratigraphy, Arctic.

DOI 10.20403/2078-0575-2022-11с-21-28

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