Tectono-stratigraphy of Bayat-Bolvadin (Afyonkarahisar) region

The studied area, located to the northwest of Afyon between Bayat and Bolvadin district, covers an area of approximately 300 square km within the topographical maps of Afyon K25 b2-b3 and Afyon K26 a4. Precambrian age İhsaniye formation forms the basement unit of the study area. Permian age Eldeş formation, which starts with basal conglomeratic levels, rests on the İhsaniye formation with angular unconformity. Early-Middle Triassic age Kıyır formation that has widespread recrystallized limestone pebbles at the base unconformaby covers the Eldeş formation.Middle Triassic-Cretaceous age Gökçeyayla formation transitionally and concordantly rest on the Kıyır formation. Gökçeyayla formation comprises Paşadağ member that has recrystallized limestone-schist alternations at the base and Karacaçal Tepe member dominated with dolomitic and dolomitic limestone on the upper part of the formation. Early Miocene age Beşsaray formation that form the lower part of cover units unconformably overlies the basement units in the studied area. Early Miocene-Pliocene age Akpınar formation and Early Miocene-Pliocene age Seydiler ignimbrites that has lateral and vertical contact relationship with each other conformably rest on the Beşsaray formation. Cover units ends with Pliocene age Yapılıkaya volcanites, Pliocene age Erdemir formation which has unconformable contact relationship with each other and Quaternary age alluviums. The study area located on the north of Tauride-Anatolides belt is remained under NE-SW and E-W trending compressional regime. Therefore, approximately NW-SE and N-S trending folds axes and N-S trending 3 tectonic slices occurred due to this compressional tectonic regime in the study area. According to the determined metamorphic mineral paragenesis obtained from the petrographical analyses of the rock samples collected from the basement rock units indicate that the outcrops of basement rocks were exposed under the green schist metamorphism conditions in the studied area.