New data on Pleistocene terraces and paleogeography of the Bulgarian part of the Black Sea shelf

Abstract

Many new facts have been lately received on the structure and evolution of shelf topography at the Bulgarian part of the Black Sea during Pleistocene and Holocene. Three main stages in the shell evolution and sedimentation have been distinguished: Early Pleistocene (Chauda), Late Pleistocene (New Euxine) and Holocene. Built-up ridges at the peripheral part of the shelf have been found for the first time, which fix the position of ancient (Late Chauda) coast line at the depth about 120 meters. The old topographic elements were inherited and manifested in the Holocene relief evolution and present-day sea floor topography.