GEOMORPHOLOGY AND LATE CENOZOIC PALEOGEOGRAPHY OF LAKE ELGYGYTGYN (CENTRAL CHUKOTKA)

Abstract

Paleogeogaphic reconstructions of the area of meteorite crater Elgygytgyn were fulfilled for several epochs in the Late Cenozoic: 3.58 million years - the fall of the meteorite; the second half of the Pliocene - tectonic activation and uprise of the Anadyr Highland; the Middle Pleistocene - accumulation of sediments of the socle terrace 35-40 meters high, marking the maximum level of Lake Elgygytgyn; the Late Pleistocene - accumulation of sediments of 9-12 meters terrace; the Early Holocene - accumulation of sediments of 2-3 meters terrace; late 5000 years - decrease of the lake's level and formation of the contemporary coastline.