ZooNotes (Feb 2020)
Geology and morphotectonics of Sredna Gora Mountains (Southern Bulgaria)
Abstract
The tectonics of Sredna Gora Mts includes three structural complexes: Precambrian, Caledonian-Herzinian and Alpine, in which several structural levels and sub-levels are distinguished. They form the main structures of the Sredna Gora Mts: Ihtimanski anticlinorium, Srednogorie horst-anticlinorium, Bailovo-Panagyuriski synclinorium (Panagyurishte Strip) and the Stara Zagora synclinorium (Stara Zagora Strip). The geological characteristics of the Sredna Gora Mts are a result of their geological development. Some limestones and marls have been formed at the end of the Mesozoic. At the beginning of the Neozoic era (through the Paleogene), the rock layers in the region were folded. The process was accompanied by active volcanic activity, so there were formed andesite, tuffs and tuffites, which in some places created unified volcano-sedimentary complexes. At the same time, the introduction of magma into the Earth's layers led to the formation of intrusive bodies. Older rocks - granites, gneisses, mica shales, have also been discovered in the process of surface formation. After the folding process, younger sedimentary rocks and deposits were formed.
