GEOSCIENCES 2007 New data on the thrust tectonics in Central Balkan region Íîâè äàííè çà íàâëà÷íàòà òåêòîíèêà â ðàéîíà

The Late Alpine thrust tectonics is regarded as determining the present-day structure of the Central Balkanides. The Tertiary thrust zones in the region of Central Stara Planina are traditionally assumed as a first-rank tectonic contact between Sredna Gora and Stara Planina tectonic zones. Nevertheless even well-presented data in the scientific publications are contradictory and show the necessity of new investi-gations. In this contribution we present initial results of ongoing work in the region of Central Stara Pla-nina ridge between Gerdektepe summit (north of Iga-novo village) and Botev summit (north of Kalofer). Botev Vrah thrust is the largest and the most im-pressive nappe structure in Central Stara Planina. It is described after the first geological mapping (Cheshitev, 1958; Milanov et al., 1969). The alloch-thonous plate is considered as an element of Sredna Gora zone emplaced over the external parts of th