Writers : Hoseinioun,Maryam
Refference : The 23th Symposium on Geoscieences;Tehran
Publishing Year : 1383

Abstract :

The Kashaf_rud Formation is a sequence of siliciclastic sediments that is outcropped in Southeast of Koppeh Dagh basin. Its lithology consists of conglomerate, sandstone, limy sandstone and shale. But different lithology that consists of sandy limestone, limy sandstone and shale with Belemnite and Ammonite, Brachiopods, Gastropods, Bivalve, Bryozoa, Ostracods, Coral, Crinoids exists in the Tappeh Nader area. The genus of this carbonate rocks are Biosparite or Bio oo sparite that shows coastal environments at the area. However original facies of Kashafrud formation is detrital facies. Many evidences show that turbidity currents are efficient on creation of these sediments such as turbiditic classic sediments, massive sandstone, pebbly sandstone, conglomerate and slide and slip. The most important of fossil at this formation is Ammonites. According to studies on Ammonites, 13 genera and 18 species were recognized and classified in two biozone (Garantiana zone and Parkinsoni zone).Based on those Biozones the age of lower part of the Kashaf_rud formation are upper Bajocian to lower Bathonian.

Subject List : Ammonite