Writers : Soleymannori, zinat; Allameh, mohsen;Torshizian, Habibollah
Refference : The first international applied geological congress; Department of geology Islamic azad university- Mashhad
Publishing Year : 2010

Abstract :

In the North &E.North of Iran Kopeh Dagh basin has formed and begins from khazar sea, passes through Turkmenistan and Iran,then inter Afghanistan. Abtalkh formation is one of the sedimentary unit of this basin that has been studied based on another fosils several times. Abtalkh formation has named from Abtalkh village on the E.North of mashhad. The supored area is located in No. 135 Kilometers of Mashhad-Kalat road, with geographical features North latitude 59 46 54 and Earst longitude 36 55 42, and its litology is mostly of blue-gray chalky shale with layers of marn.Ther was thin layers of clay sand stone and marn –sandy limestone, near the upper level of mentioned formation. Its down boundary with Abderaz formation and upper boundary with Neyzar formation is conformable and its thicknes is 960 M .for studing of formation according to Ostracoda , 49 sampels have been taken. For separating Ostracoda of surrounded sediment, samples were washed and then were photographed by electronical microscop. Based on spices from genus Xestoleberis , Cytherelloidea we suggested, shallow&warm basin sedimentary for this section on that time.

Subject List : Ostracod