PALEO-RIVERS CHERNAYA AND BELBEK AT THE CONTINENTAL SHELF OF SOUTHWESTERN CRIMEA – NEW OBJECT OF ECOLOGICAL RESEARCHES
Keywords:
Belbek-Chernaya paleo-delta, paleo-riverbeds, organic matter of the seabed sediments, Black SeaAbstract
The description is presented for the first researches of ancient parts of the Chernaya and Belbek rivers flooded by sea, which were detected at the sea floor of the Sevastopol coastal area. Earlier both rivers had a joint estuary; locality of confluence of their paleo-riverbeds was found at a depth 90 - 96 m of the present-day Black Sea shelf. Relic fragment of the Chernaya River, nowadays covered by sea, differs by the complicated configuration. In the limited provinces where seabed was done by hard primary rocks its contours retrace the form of sea floor, while at the areas with friable sediments the most details of the river structure are degraded or can be tracked fragmentary. The width of a river channel comes to 420 - 490 m, depth can reach up to 11 m. Paleo-rivarbed of Belbek is characterized by much smaller sinuosity than Chernaya River and deepening of channel does not exceed 6 m. Bottom sediments of the Chernaya paleo-river have negative levels of redox potential as well as increased content of organic matter. Discovered ancient objects can be important for study of ecology of the modern benthos communities.
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