Abstract: Ulukışla Tertiary sequences are located in the southeastern part of the Tuzgölü Basin and geologically bounded to thenortheast by the Niğde massive, to the east by the Ecemiş Fault, to the south by the Bolkar Mountains. The basement of the Tertiary sequences is the Campanian-Lower Maastrihtian aged ophiolitic melange which is tectonically located on the Permian to Upper Cretaceousrocks of the Bolkar Group. The oldest unit of the sequence is the Sansartepe formation consisting of volcanics, dikes and sills. The activity seems Ypresian aged in the south and Paleocene in the north. The Sansartepe unit is covered by the Başmakçı limestone of LowerYpresian in the north, and by Karatepe limestone of Lower Lutetian in the south. The detritics of the following Sereyenkaya formation isthe lateral extinction of the same limestones. These units, which are conformably overlaine by the turbiditic Güney formation, are observed to indicate Ypresian in the north and Lutetian-Bartonian in the south. Zeyvegediği gypsum and anhydrits and the laterally locatedKabaktepe member of the area are deposited in an evaporitic basin following the continental period of Upper Eocene. The sequence isoverlaine conformably by marls and limestones of Kurtulmuştepe formation and sandstones of Kızılöz formation of Lower Miocene. Middle and Upper Miocene are represented by Kızıltepe, Kızılbayır and Katrandedetepe formations. Beştepeler formation in the north, alluvialterraces in the south are the Pliocene sediments of the area studied.The sequence is terminated by the Quaternary alluviums in the studied area.