Figure 6. Glacial geologic features of the New Siberian Islands and adjacent continental shelf [Grosswald, 1988b, 1989]: (1) submarine glaciotectonic ridges; (2) terrestrial glaciotectonic ridges; (3) tunnel valleys; (4) sandy outwash plains; (5) wet terrains; (6) flat-bottom basin of glacial excavation; (7) direction of horizontal ice pressure; (8) complex of parallel lakes and ridges.