RANGE OF OCCURRENCE OF THE SARTAN GLACIER IN WEST SIBERIA

Glacial formations have been studied in the central part of the Siberi an Spurs, West Siberia. Many researchers referred it to the Taz stage of the Samara (maximum) glaciation, or to the first Late Quaternary (Z yryanka) glaciation. Analysis of the data obtained has shown that thes e glacial formations are represented by subaerial forms. They are left by a glacier whose margin was situated on land and, when hypsometrica lly below 125 m, in a shallow-water near-glacier lacustrine basin (Man si). Well-preserved glacier forms, moraines lying immediately on the s urface, and no boulder-free sediments covering the glacier boulder-con taining deposits suggest that the marginal glacial formations of the S iberian Spurs are left by the last, Sartanian (Late Wurmian) glacier. This age is also indicated by the absence of the Karga-Sartanian fluvi al terrace in the valleys of northern West Siberia. The glaciodepressi ons left by ice Flows are as follows: Ob', Polui, Nadym, Pur, Taz, and Yenisei. They are bordered on the south by arcuate bands of marginal glacier forms.