Abstract: Four separate fault zones have been distinguished on the basis of author`s recent observations made in theregion between Lake Van and Iranian border, and it is also deduced that one of those, in particular, no. I in the northcould be an extention of the North Anatolian Fault Zone.Çaldıran Fault which caused Çaldıran Earthquake of 24 th November 1976, indicates a new dislocation parallel to theprincipal fault (North Anatolian Fault having similar strikeslip and right-lateral motion.Wide spread ophiolite complex of the area investigated is not, in fact, so complex as has been so far noted. it exibitsrather regularly - layered structure. This complex sequence (melange) which is, composed primarily, of serpentinites,radiolarites, submarine volcanics and their related tuffs, red coloured limestones and marls and variegated shales,place to place, it contains blocks of metamorphics and Permian limestones of various sizes. in other words the metamorphicrocks and the Permian limestones are also the elements of this complex. All of these rocks have constituted a "subductionmelange" in the same subduction zone.