sentences:  The T-zone is deformed and is interpreted by some authors as a regional thrust of pre-major folding age.There are two major high angle fault systems aligned north-west and north-east respectively.A large low-angle thrust cuts the gneiss, schist and marble sequence at the south-west corner of the island, probably indicating an overthrusting of the Serbomacedonian Massif onto the Rodope Massif.