Stages in Development of Precambrian and Paleozoic Biota, Ichnofossils, and Sedimentation Patterns in Transbaikalia

摘要

Main stages in development of the Transbaikal biota in the Precambrian and Paleozoic are considered with description of reference group of organic remains and ichtyofossils for each of them. It is established that localities of their finds are confined to different lithotectonic zones of ancient basins in the region under consideration with peculiar depositional environments.