Figure 8. Paleogeographic maps of the development of the Laptev Sea shelf and adjacent territory during Cenozoic [{\it Paleogeographic...,} 1992]. A - Late Cretaceous, B - Early Paleocene (65 Ma). Land areas: a 1 - highlands; a 3 - erosional planes and lowlands; b 1 - alluvial and lacustrine plains; b 2 - coastal plains (alluvial and marine); b 3 - coastal plains, periodically submerged by sea; b 4 - intermountain and piedmont plains and depressions; b 7 - playa lakesand evaporite basins; e 1 - inner shelf; e 3 - outer shelf; f 1 - continental slope; f 2 - continental rise; g 1 - ocean floor and deeps.