Öz
The study was carried out on samples from 2 drillings in the vicinity of Berdan and Kazanli on Tarsus and Mersin road. Stratigraphic and environmental characteristics of the Late Neogene (Tortonian-early Pliocene) units of Adana Basin were studied in 2 drillings made in clay, marl, sandstone, siltstone and clayey limestone. As a result of the lithological and micropaleontological analysis of the sequence, it is seen that the environmental feature, which starts with epineritic conditions in the Kazanlı drilling at Kuzgun Formation, passes into the brackish towards the upper levels of the sequence. In the Berdan drilling, planktonic foraminiferal fauna was found in the lower level of Kuzgun Formation along with neritic species of ostracod. The formation shows shallowness at the middle level and shows a transition to brackish conditions. In the Handere Formation which was cut during this drilling, the neritic conditions were significant. Marine horizons of the Kuzgun Formation include ostracod planktonic foraminifera such as Globoquadrina dehiscens, Globigerinoides trilobus trilobus, G.trilobus sacculifer, G.obliquus obliquus, G.obliquus extremus, Orbulina universa, Globigerina venezuelana and ostracod species such as Cytheridea acuminata neapolitana, Cytheridea acuminata acuminata, Loxoconcha rhomboidea, Loxoconcha turbida, Neomonoceratina mouliana. The ostracod species of this formation indicating the brackish environment are Cyprideis seminulum, Cyprideis anatolica, Cyprideis torosa. In the Handere Formation, the ostracod species observed in the neritic environment such as Carinocythereis carinata, Urocythereis seminulum, Krithe monosteracensis have been determined.