Writers : Rivandi,Batool;Najafi,Mahdi;Mousavi Harami,Seyd reza;Mahboobi,Asadollah;Vahidinia,Mohammad;Mousavizadeh,Seyd Mohammad Ali
Refference : 11th Symposium Of Geological Society Of Iran - Mashhad, Ferdowsi University
Publishing Year : 1386

Abstract :

Barremian-Aptian Tirgan Formation has an exellent northwest- southeast trending exposure in eastern part of the Kopet-Dagh Basin. This Formation consist mainly of oolithic and Orbitolin limestone and shale interbeds. It is conformably overlain and underlain by the Sarcheshmeh and Shurijeh Formations respectively. Two stratigraphic sections were measured in northern and southern flanks of Khore syncline. The results of this study revealed that these sediments are deposited in shallow carbonate ramp and in the 4 facies belt including open marine, bar, lagoon and tidal flat. Based on Stratigraphy sequence analysis, 3 depositional sequences have been identified that are bounded by type 2 sequence boundries. Paleontological studies in this area show present two fossil associations from bentonic foraminifers and calcareous green algae. Recognition of 8 genuses and 11 species of bentonic foraminifers and 3 calcareous green algae suggest Barremian- Aptian age for these sediments.

Subject List : biostratigraphy