THE BULGARIAN BLACK SEA SHELF AND COAST DURING THE QUATERNARY-GEOLOGICAL EVOLUTION AND CLIMATIC CHANGES RAINA HRISTOVA 177-179 THE BULGARIAN BLACK SEA SHELF AND COAST DURING THE QUATERNARY-GEOLOGICAL EVOLUTION AND CLIMATIC CHANGES

Raina Hristova, Assoc
2018 JOURNAL HOMEPAGE: WWW.SOCIOBRAINS.COM   unpublished
The monograph discusses the palaeogeographical reconstruction of two major morphological units, the coastal zone and the open shelf, which are genetically connected. Both units are genetically connected and form part of the Western Black Sea zone. Nowadays, they are differentiated in the contemporary coastal line, however, in the geohistorical development of the Black Sea deep-sea basin during Neogen-Quaternary time, the coast-shelf zone had been repeatedly at times either land, or, at other
more » ... es, it had been submerged under water, but always very dynamic. The presented research establishes a new complex approach to the reconstruction of the dynamic palaeogeography of the Black Sea coast and shelf from the beginning of the Quaternary 2.6 Ма to contemporary times. The climatic changes, the sea level fluctuations and the palaeogeographical conditions of the Black Sea coastal and shelf areas during the Quaternary have been reconstructed and discussed. The characteristic feature of this paper is that the data of numerous terrain and marine expeditions have been summarized with an aim to reconstruct the development of the Bulgarian Black Sea coast and shelf. The climatic and sea level changes of the Black Sea during the Quaternary have been traced out on the basis of the analysis of the transgressive-regressive cycles, terrace complex along the coastline and lithological and biostratigraphical research on molluscan fauna and palynological data. The Quaternary sediments of the regional stratigraphical level have been analyzed from the point of view of the lithofacies, biostratigraphical and geomorphological position. A correlation between the units of the coastal zone and the shelf area has been made and it has been concluded that features within both areas had been the result of the same transgressive-regressive cycles of the Quaternary evolution of the Black Sea.
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