The delta of the Kuban River, the largest river in the North Caucasus, formed under the influence of significant sea level fluctuations in the Holocene. The entire delta region of the Kuban River is divided into two parts – the Azov-Sea and the Black-Sea. The Black-Sea part of the marine edge of the Kuban River delta, represented by the Bugazskaya and Vityazevskaya bay bars separated by the Blagoveshchensky outlier, is a part of the lithodynamic system of the Anapa bay bar. The lithodynamic aspects of the development of the Black-Sea part of the of the Kuban River delta coastline (which largely determined the formation and dynamics of the Anapa bay bar) are analyzed based on field and remote sensing data, as well as archival and literary sources. It is shown that the alluvium of the Kuban River is a component of the sediment budget of the lithodynamic system of the Anapa bay bar during regression periods, in which solid runoff entered directly into the coastal zone of the Black Sea. During the Phanagorian regression, ~94 million m3 of tractional sediments could have been carried into the Black Sea coastal zone, which is comparable to the volume of the active sediment layer of the modern Anapa bay bar. During transgressions, sediments were deposited in the depths of sea bays, and after their separation from the sea by a bar (the future Anapa bay bar), of lagoons and did not reach the seashore. Since the beginning of the 20th century, under the effect of a combination of natural and technogenic factors, the flow of the Kuban River into the Black Sea has virtually ceased. Along the Bugayskaya and Vityazevskaya bay bars, areas with different rates of retreat of the seashore line predominate due to the increasing deficit of sediments in the lithodynamic system. This section of the coast can be considered the Kuban River delta coastline only in the paleogeographic sense.
M.V. Krylenko (Wed,) studied this question.