Sedimentary basins, tectonic zones in the geological development of the Eastern Balkan Range

In the article is presented geological evolution during Alpine tectonic cycle in the area of the Eastern Balkan Range. The establishment of a tectonic zone is the main tectonic event to take place in an orogenic region, such as the Balkan Range. Tectonic zoning is based on structures, which have specifically developed in the space (in a specific type of rocks) in an exact interval of the geological time. The main define for the zone is the spatial range of the folds formed as a result of the activity of a specific phase.Throughtout its development, the tectonic zone has passed through few phases, namely: establishment of a sedimentary basin, folding of its deposits as a result of the activity of one or more structural phases. The formation of nearly all tectonic zones in the Eastern Balkan Range ends with a horizontal displasement of the rocks, which is more or less regarding the amplitude. The main result of the work is the establishment of the tectonic evolution of the Kotel tectonic zone, Kachulka tectonic zone, Sredna Gora tectonic zone and Luda Kamciya tectonic zone in the limits of the Eastern Balkan tectogen. A new sedimentary zone was formed in the Eastern Balkan Range during the Oligocene. The last one is not tectonic yet due to the lack of the deformation within its constructive deposits.