Latest Pleistocene permafrost structures in the southwestern West Siberian Plain

摘要

Numerous zones of polygonal pattern have been revealed in deciphered satellite images of southwestern West Siberia within 57°12′ to 53°55′ N and 62°56′ to 75°20′ E. The polygonal pattern is especially prominent in images shot in fall or spring seasons at sites occupied by tillage in the time of observations. The polygonal pattern appears to control the river network in some images.