ABSTRACT
This chapter deals with the following subjects: Depth and thickness of the rock zone with subzero temperature on the Eurasian Arctic coast; data on submarine permafrost extension in the Laptev and East Siberian seas; and composition and structure of the submarine permafrost. The scientists usually specify the submarine permafrost they describe as simple sediment or rock at a year-round temperature below 0°C. In the Laptev Sea, the thickness of the permafrost 3 km offshore is more than 66 m and the permafrost body is separated by several layers of unfrozen rocks. In the eastern part of the sea, the surface of the bonded permafrost decreases with increasing distance from the shore, from 35 m at 2 km to 85 m at 10 km offshore. The almost universal presence of underground ice dimensions, and origin, is the most characteristic peculiarity in the structure of permanently frozen Quaternary deposits developed on the seacoast.
