ABSTRACT:. In the basins of Emet and Gediz, Tertiary and Quaternary sediments and volcanic rocks are widespread. The rocks of the Neogene age unconformably overlie the basement rocks which are upper Cretaceous or Pre-Ctetaceous in age, The Miocene and the Pliocene Sediments are of terrestrial origin, being accurately datey by radiometriö, palinologic and paléontologie methods. They were deposited in the intermontane basins representing different faciès. An angular unconformity has been found between the rock units of Miocene and Pliocene age especialy in the southern part of the investigated area. The volcanic activity continued during the Moeene and the Pliocene periods* Plio-Quaternary and Quaternary sediments are represented by coarse grained fluviatUe deposits,