Abstract
The morphostructure of the Kamchia Mountain forms the northern border of the Primorska part of the Eastern Stara Planina Mountain. The topicality of the topic stems from the insufficient geomorphological and morphotectonic studies of the Kamchia Mountain from the point of view of plate tectonics. New views on the morphostructure and evolution of the Eastern Stara Planina are presented. An attempt was made to build a modern model for the Neogene-Quaternary paleogeographic and geodynamic features of the Eastern Stara Planina Mountain.
The Kamchia Mountain has the character of a complex structure, highly complicated by listric faults, a positive morphostructure, formed in a Paleogene flysch alternation of marls, siltstones, sandstones and limestones. The Kamchia morphostructural unit, like the Emine one, is relatively monolithic in its western part. To the east, the ridge of the mountain is veritril-shaped branched and its altitude decreases in the direction of the Black Sea. From a morphostructural point of view, the Kamchia Mountain falls on the eastern edge of the Bulgarian continental microplate. The proposed study will contribute to the clarification of the role of the interaction between the Bulgarian continental microplate and the Black Sea oceanic microplate located east of it, representing a remnant of the Tethys Ocean that is not absorbed by the subduction zone.