TECTONIC EVOLUTION OF WESTERN ANATOLIAN EXTENSIONAL PROVINCE DURING THE NEOGENE AND QUATERNARY
During the late Miocene North-South extension started. During this period major breakaway faults began to form around Bozdag, located in the central part of the region. Consequently Bozdag began to rise. The depositional respons of this elevation is red, coarse clastics deposited along the periphery of Bozdag. Away from the Bozdag high clastic rocks pass laterally into white lacustrine limestones.
During the Late Miocene-Early Pliocene period sporadically developed alkaline basalts were formed. The North-South extension ceased for a brief period to the end of Early Pliocene, and a regionwide erosional surface was formed consequently. When the North- South extension was reactivated the present graben system began to form. The East-West trending graben-bounding faults cut and disconnected continuity of the previously developed N-S grabens. As a result they remained as hanging grabens on the footwall blocks of the East-West grabens.