FOSSIL ROOTS FROM THE UPPER TATARIAN DEPOSITS OF THE SUKHONA AND MALAYA SEVERNAYA DVINA RIVER BASIN: STRATIGRAPHY, TAXONOMY, AND PALEOECOLOGY

Abstract

Fossil roots Radicites sukhonensis sp. nov. and R. erraticus sp. nov are described from the Upper Tatarian Substage in the basin of Sukhona and Malaya Severnaya Dvina rivers. Fossil roots are assigned to five distinct morphotypes. A model of catenic distribution of the root morphotypes is proposed. Paleoecological implications of the model are discussed.