OLIGOCENE CALCAREOUS PLANKTON FROM THE KRONOTSKII PENINSULA, EASTERN KAMCHATKA

Planktonic foraminifers and calcareous nannoplankton were first record ed along with benthic foraminifers in the Upper Paleogene section of t he Kronotskii Peninsula, eastern Kamchatka. The fauna permits the assi gnment of the enclosing sediments to the Globigerina ampliapertura Zon e of the foraminifer zonation of Bolli and Saunders, (1985) and to the nannoplankton zones CP17-CP18 of the Lower Oligocene. The sporadic oc currence of calcareous plankton in Oligocene sediments of high latitud es was most likely a consequence of the World Ocean level rise and rel ative climatic warming.