Аннотация:Demerdzi Plateau located in the central part of First range of Mountain Crimea between Mts. Chatyrdag, South Demerdzi and Dolgorukovskaya Plateau. The geology of the area is a subject of strong debates, but the structure and sedimentology of the Upper Jurassic were not re-studied for a long time. The aim of this investigation is to discuss the structure, stratigraphy and sedimentology of the region on the base of the new data, we have received in 2008-2010.