Accession Number : AD0719988

Title :   Main Geomorphological Characteristics of the Bottom of the Bering Sea and Alaska Bay (Osnovnye Cherty Geomorofologii Dna Beringova Morya i Zaliva Alyaska),

Corporate Author : NAVAL OCEANOGRAPHIC OFFICE WASHINGTON D C

Personal Author(s) : Gershanovich,D. E.

Report Date : 1971

Pagination or Media Count : 19

Abstract : The study is based on data gathered by the latest expeditional observations in the Bering Sea and the Gulf of Alaska. Three zones of morphostructures can be distinguished on the ocean floor -- continental, transitional and oceanic -- each of which is associated with corresponding types of the earth's crust. Volcanic activity has contributed greatly to the complexity of the geological structures represented by the Komandorsko-Kurile Islands arch and by deep depressions and trenches. Some of these structures are still activity changing their forms. These changes are, however, often very complex. The Aleutian Trench, for example, is receiving such large quantities of sediments so that it is from 2 to 4km shallower than the adjacent trenches. In spite of this, its form is preserved because the rapid sinking of the trench bottom makes the sedimentation rate in the area quite intense. (Author)

Descriptors :   (*OCEAN BOTTOM TOPOGRAPHY, *BERING SEA), (*OCEAN BOTTOM, *ALASKA GULF), VOLCANOES, CONTINENTAL SHELVES, SEDIMENTATION, INTENSITY, USSR

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE