Jeoloji Münendisliği Dergisi

The geology and allocthonous units of the northwestern Sultandağ

ABSTRACT: The investigated area is located m the mcsrtherii part of the We^t Taurus monutala whose tassement m Sultaııdeıde formation and age is of upper Oambrlaii-Lower Ordovîcian, This unit is unconu formably overlain by a Ua»sic-Lutettaa aged continuous rodänantary sequence, This sequence is basically Consist of pre-MaestrlehMai! carbonates and, pelagic and neriitio deposit!» of Mae»trlchttan-Lutetlait age. Hoyran ophloMtMc melange was emplaced to the region by a tectonic process at the end of Lutetian, During tha Upper Mjowne, tM& basin was filled bj a rapid terrestrial-lacustrine sediments initiated by a new period of tectonic instablMty, In the area, It is found that there are structures related tb Caledöniaaı and Alpine orogenesis. The Mesozolc and Cenozoie aged formattons were folded by the Alpine orageny, On the other hand, it may be said that Paleozoic aged Sultandede- formation was affected by both Oatedonlan and Alpine orogenesis. Sultandede formation could he said to have emerged by the pre Devonian orogenlc phases, Due to erosion, the Lower Ordovieian=Llas*!c aged rocks are not outcropped in the area, The unconformity between Llassic-Lutetlan aged sedîments and the Upper Miocene aged Bafkonak formation may be explained by the Pireneen orogenic phase, In the Pireneen orogenie phase, folds and systematic joint sets also developed to the Liassie=Lutetiân aged sequence, After the Lutetian, the vertical movements In ttie area were primarily dominant and, eonseqently, the faults developed Wmt affected the beds and also fold axes. These faults however, present some difficulty in tracing the fold axes in the long dfetances. The uplifting happened at the end of Pliocene, seems to help clarify the Rodanian onagenlc phase.