Abstract: The area under investigatlon covers the central part of Murat Dağı (Murat Mountain). The oldest rock unit of thearea is the Aşağı Belova Formation of Jurassic age, being composed of the Yargediktepe Member and the Çiçeklikaya Dolomiticlimestone Member. Both members have lateral and vertical gradational contacts. The Yargediktepe Member consists of tightlyfolded metasandstone and metaslltstone of different chemical compositions, subjected to a greenschist metamorphism in a gradenot higher than quarter albite-muscovite chlorite subfacies. A§ağı Belova Formation is tectonically overlain by the OphioliticMelange of Late Cretaceous age consisting of sedimentary (cherty ltmestone, radiolarite); magmatic (peridotlte, spilite, tuff) andmetamorphic (schist; marble) rocks of varying dimensions. The metamorphic constituents of the melange are rich in aluminacontent with a fair amount of sillca. Their metamorphism is of the Barrov type indicatlng a staurolite -Almandine subfacies of theAlmandine -Amphibolite facies. The chemical compositions of the magmatic rocks of the ophiolitic melange indicate the existenceof two different rock assemblages in the melange. Ne, increase in volume has been observed in these rocks. During theserpentlnization of the peridotites.Chemical compositions of Baklan Granite of Paleocene age (Monzogranite) and Karacahisar volcanics of Middle Miocene age (rhyolite, rhyodacite and rhyolitlc tuff) may indicate that these rocks are the products of magma types some ofwhose properties are alike and others of whic are unalike. The sedlmentary rocks of Tertiary age in the area are made upof coarse clastics.Radloactive age measurements made by K-Ar and Rb/Sr methods gave the following results. The age of the folding andmetamorphism of the Yargediktepe Member Is 126,5+-11 m.y. (Late Jurasslc -Early Cretaceous); the age of the latesthomogenizatlon of the metamorphic mass in the melange on the hasis of the Rb/Sr method is 70,4+-3 m.y. (Maestrlchtlan); the ageof the crystalllzatlon of the Baklan Granite Is 52+-7 m.y. (Paleocene -Eocene); the age of the Karacahisar volca-nics ranges from16,9+-0,2 to 20,9+-0,5 m.y. (Middle Miocene).