Transformation of Malacological Fauna of the Sea of Azov in the Holocene and Its Role in the Formation of Coastal Spits

Abstract

The study and analysis of malacofauna from cores of bottom sediments and cores of the Azov spits showed the nature of the change during the transition from the Ancient Azovian to the New Azovian layers and the uneven distribution of communities in time and space. Shell material from littoral malacocenosis and shallow-water banks is the main component for the formation of spits. Based on a series of cores up to 25 m thick from the Dolgaya Spit, it is shown that its formation began about 2500 years ago, and carbonate material reflects the history of the development of the benthic fauna of the sea.