Morphology of central part of the Danube alluvial fan

Abstract

During the 8th voyage of R/V «Vityaz» a detail echo-sounding has been fulfilled within a test area (60х105 km) in the central part of the Danube alluvial an (NW Blaсk Sea); total length of sounding profiles exceeds 1700 km. Data processing, analysis and interpretation resulted in construction of composite profiles of sea floor topography, bathymetric and geomorphological schemes. A physiographic block-diagram of the studied part of the fan was constructed on the basis of the depth cadastre and a digital model of the sea floor topography using the computer ES-1035. The area corresponds to an active fault zone. The paper describes in detail the morphology of the largest sedimentary body in the Black Sea. Some conclusion are drawn on the fans formation and development.