Accession Number : AD0622379

Title :   REGULARITIES IN THE DISTRIBUTION OF BOTTOM SEDIMENTS ON THE SHELF OF THE SOVIET COAST OF THE BLACK SEA (ZAKONOMERNOSTI RASPREDELENIYA DONNYKH OSADKOV NA SHELFE SOVETSKIKH BEREGOV CHERNOGO MORYA),

Corporate Author : NAVAL OCEANOGRAPHIC OFFICE WASHINGTON D C

Personal Author(s) : Barkovskaya,M. G.

Report Date : 1965

Pagination or Media Count : 42

Abstract : The investigations conducted during the years 1946-1950 are discussed. The zoning and distribution of the bottom sediments is based on the following: The geological structure of the land mass adjacent to the Black Sea, the petrographic composition of the denudation areas, the land relief, the coastal configuration, the steepness of the shelf etc. Over 100 cross sections ranging from 2 to 50 miles long, normal to the coast, were employed. Sectors with clearly pronounced variations in sedimentation were selected, such as, platform and geosyncline regions, mountain areas, plains, gulfs, estuaries, capes, etc. The bottom samples were taken by the Petersen grab and corers (2.5 meters long). On the basis of approximately 3000 samples taken on the Black Sea Shelf, the following zones were established: indigenous rock, pebble, boulder, block, gravel, sand, mussel, aleurite mud, aleurite-pelite mud and pelite mud zones. The width, character, distribution and other aspects of these zones are noted and compared with earlier studies by Zenkovich, Klenova and others. The biocoenosis in the sediments is based on previous studies by Zernov (1913) Arkhangel'skiy and Strakhov (1938). Special investigations were conducted in order to link the various biocoenosis, such as mussel Mytilus and phaseolin mud biocoenosis, with the listed sediment zones on the shelf and to point out the regularities governing the association between the types of biocoenosis and sediments. (Author)

Descriptors :   (*BLACK SEA, MARINE GEOLOGY), (*MARINE GEOLOGY, BLACK SEA), (*SEDIMENTATION, BLACK SEA), OCEAN BOTTOM TOPOGRAPHY, MARINE BIOLOGY, PETROLOGY, ECOLOGY

Distribution Statement : APPROVED FOR PUBLIC RELEASE