Writers : Taheri,Poya;Mosavi, Seyed Mohamad Javad;Hallaje, Mansoreh
Refference : The first international applied geological congress; Department of geology Islamic azad university- Mashhad
Publishing Year : 2010

Abstract :

In order to study sequence stratigraphy, facies and depositional environment of Bahram (Devonian) Formation, a stratigraphic section with a thickness of 368 m in Mountain. Shurab, located in southern Damghan, was selected. This Formation Consist Mainly Of Carbonate And Dolomite Facies. Microscopic studies of Bahram Formation led to the recognition of four Facies Groups, coastal subenvironment, tidal flat, lagoonal and shoal. Coastal facies consist of three microfacies: sublitarnite, quartzarnite and calclitite. Tidal flat facies consist of stromatolite boundstone and lime mudstone. Lagoonal facies consist of bioclast wackestone, peloidal bioclast grainstone, peloidal bioclast packstone and umbella/osteracoda packstone. Finally, shoal facies include bioclast packstone/grainstone microfacies. This Formation was depositional in a ramp sequence. Microfacies vertical changes and their comparison with sea level fluctuations led to the distinction of three large-scale sedimentary sequences.

Subject List : Sequence Stratigraphy, sedimentary Environment