THE CENOZOIC OF SAKHALIN: MODERN STRATIGRAPHIC SCHEMES AND CORRELATION OF GEOLOGICAL EVENTS

Abstract

Paleogene and Neogene stratigraphic schemes of Sakhalin are characterized. The schemes comprise from 11 to 12 regional stages and up to 50 formations. A calendar of various geological events (tectonic, volcanic, sedimentation, climatic, biotic, and others) is compiled on that basis. In particular, stages of different scale changes in marine biotic assemblages are revealed and discriminated into major (15-17 Ma long) or subordinate and minor (2.0 and 0.3-1 Ma long). Several phases of the tectonic and volcanic activation, as well as periods of warming and cooling are distinguished. The analysis of geological events shows that many of them are synchronous to a certain extent, though it does not always happen that their causes and effects are understandable.