ABSTRACT: Başlamış formation cropping` out in the vicinity of Başlamış- village,, west of Menderes massive, overlies the ophiolitic complex with. an. angular uneonformity.- It consist, from base to top, of a conglomerate consisting mainly of opMolite pebbeles and is transitionally followed by sandtones, marls and limestones. Herdian, Cuisian and Lutetian fossils have been found in this formation. It is conformably overlain by a sequence- consisting1 of an .alternation of red coloured conglomerates and sandstones of probably Oligocène age. These .are iinconfor- ^ mably overlain by conglomerates and volcanics of probably Miocene age,.