Paleogeomorphological analysis of river deltas within Tazovskaya Guba

Abstract

Deltas of Pur, Taz and Messoyakhi .rivers were formed during the Late Pleistoce.ne .and Holocene under conditions .of reduced river discharge (by factor of 1,1 to l,8) and solid runoff (by factor .of 3 to 4), rising oceanic level and active differentiated tectonic .uplift .of .the area (up to 112 mm per year). Geomorphological mapping .of low terraces and fIoodplain levels together with radiocarbon dating of the sediments permit to reconstruct main stages of the deltas relief formation in the process of .infilling of narrow ingression bay.