New data on the Ocean Anoxic Event 2 near the Cenomanian-Turonian boundary in the Biyuk-Karasu river sequence (Central part of Mountain Crimea)
Journal: Moscow University Bulletin Series 4 Geology
Year: 2019

In the carbonate sections organic-rich clay interlayers on the Cenomanian and Turonian boundary were indicated. They were formed as a result of the periodic formation of anoxic conditions in the basins. A section of the Cenomanian and Turonian boudary sediments at the river Biyuk-Karasu (Central Crimea) was investigated. Dark organic-rich intercalations with light colored carbonate clays formed during the period of ocean anoxic event (OAE2) were identified. These interlayers contain large amount