New data on the Eocene Radiolaria of the North Caucasus-Mangyshlak petroleum province
A complex of Radiolaria of zones Cyrtophormis (?) Alta and Ethomosphaera (?) Polysiphonia, which includes about 50 species belonging to 18 genera and 11 families has been identified in the Eocene sediments, Kuma formation of the North Caucasus-Mangyshlak petroleum province. A new type of Hexacontium donicum Sarkisova, sp. nov. Radiolaria of these units were found together with planktonic Foraminifera.