Abstract: This investigation involves the evidences of geological studies that have been done on the investigatedarea are divided in  the two units as the pre-Neogene and the Neogene- post-Neogene. The pre-Neogene ones consist ofthe Upper Cretaceous aged ophiolite and ophiolitic melange (Lower Tectonic Slice), Upper Cretaceous to Lower Eoceneaged the Blocky Flysch (Middle Tektonic Slice) and Upper Triassic to Lower Eocene aged sediments (Upper TectonicSlice) that begin with mainly carbonates at the base and lasted with the elastics at the top. On the other hand, the Neogene and post-Neogene aged ones are built up by fluvio-lacustrine and marinal sediments of Pliocene age and alluvium,beachsand, beachrock, talus, old terrace and volcanic deposites of Quaternary age. The Upper Triassic to Lower Eocene aged sequence deposited in the most western part of a trough that developedduring Upper Liassic ( Dogger) between The Menderes Massif and the Beydağları neritic platformes. This serie showssome differences concering age with respect to ones deposited in the eastern part of the trough.Furthermore, possible structural modelling for the neotectonic period of the peninsula was proposed by the author.According to this model, the Datça Peninsula is a great horst block between the Gökova Graben and the HisarönüGraben.