Writers : Nagafi,Mahdi;Kouhsorkhi,Ali Reza
Refference : Geosciences Scientific Quarterly Journal,No.29_30
Publishing Year : 1377

Abstract :

The Kopet_Dagh Basin is located in the north and northeast of Iran. From Jurassic through Miocene, the sedimentation went on relatively uninterruptedly in this basin. The area of study is located in the Cheshmeh Gilass Mountains which is situated about 50 km. north west of Mashhad. The purpose of this study is to identify different litho facies, as well as, ultimately to interpret the depositional history of the Shurijeh Formation in this area.
The Shurijeh Formation (Neocomian; Kalantari,1969), is about 490 meters thick in this area, and conformably overlies the Mozduran Formation (Upper Jurassic) and also conformably underlies the Tirgan Formation(Aptiart). This interval is mainly composed of redbed siliciclastic sediments and mostly fine to medium-grained rocks (shales and sandstones), that have been deposited in fluvial environments. Carbonates(micritic limestone and dolomite) and evaporate (gypsum) litho facies of this formation indicates that, they were deposited in a closed basin (probably lake) under arid to semi-arid climatic conditions.

Subject List : Lithostratigraphy