Figure 1. Main tectonic elements in the Caspian area. Al =Alborz Mountains, A= Arabian Plate, BM = Bitlis Massif, EAAC = East Anatolian Accretionary Complex, EP = East Pontides, F = Farah Block, H = Helmond Block, I = Indian Plate, I-Z =Istanbul Zonguldak zone, K = Kirsejhir, L = Lut Block, M = Moesia, M-T = Menderes Taurus Block, NT = North Transcaucasus, NWI = Northwest Iran, S = Sakarya, ST = South Transcaucasus, S-S = Sanandaj-Sirjan Zone.