ABSTARCT: In the area of Domoniç, Tavşanlı, Kütahya and Gediz the Tertiary Sedimentary and volcanic rocks are widely distributed; they overlie unconformably the Pre-Tertiary rocks. The first Tertiary sedimentary unit of the region is the Eocene limestones e-posed in a limited area between lıvpnİı and Tunçbîlek, With the neotectonic phase started in the Middle Miocene, graben basins began to form. In the Pliocene, lake and river deposits accumulated in the widely extended basins. Quaternary b represented by the coarse grained river deposits and travertines. Acidic volcanism which started in the latt-Miocene occurs as lavas and pyroclastics till the end of pliocene. In the Pliocene together with this volcanism another volcanism of İntermediıta-basic composition took place, Tunçbîlek, Seyitömer and alabarda basins rave great importance for coal.