Outline of the Geology of Tepeköy Area, NW Konya/ Central Turkey

Abstract

It is aimed to outline the geological characteristics of Tepeköy region, in where Upper Permian - Lower Cretaceous Gökçeyurt group is exposed. Upper Permian Derbent formation, oldest formation of the group, is exposed with metacarbonates, quartzite and phyllite, which shows transition laterally and vertically to Upper Permian-Upper Triassic Aladağ formation containing phyllite, metasandstone, metaconglomerate, calcschist and metacarbonate. Upper Triassic-Lower Cretaceous Lorasdağı formation, the youngest one of the group, overly conformably the Aladağ formation, and is composed of recrystallized limestone, dolomite and dolomitic limestone. All these units were overlied unconformably by Upper Miocene-Lower Pliocene Dilekçi Group, containing Sille formation, Ulumuhsine formation, Küçükmuhsine formation, Sulutas volcanics and Yürükler formation. The Sille formation is characterized by alluvial material while the Ulumuhsine formation contains lacustrine limestones. Then intensive calc-alkaline volcanic activity initiated, producing tuff, tuffite, volcanic breccia (Küçükmuhsine formation), and various volcanic rocks, mostly dacite, andesite and rare basalt (Sulutas volcanics), which is covered unconformably by Upper Pliocene-Quaternary alluvial sediments