Writers : Bakhshandeh,Lida;Aghanabati,SeydAli;Mohtat,tayebe
Refference : Geosciences Scientific Quarterly Journal,No.:65,P.:26
Publishing Year : 1386

Abstract :

The first studied Abtalkh Formation with Campanian Maastrichtian age is well exposed in Kopeh Dagh area (Mozduran section). This formation conformably underlain carbonates of Abderaz Formation and overlain by Neyzar sandeston Formation, both formations have a gradual contact.
The second studied formation so called Echinid marl formation of Santonian -Late Campanian age is exposed in Baharestan section, Central Iran, Esfehan area.
Based on 100 studied samples, there are litological and paleontological similarities between Abtalkh and Echinid marl formations. These evidences support strongly paleoecological and environmental similarities.
This ascertainment shows the close relation between the Kopeh Dagh and Central Iran basins.
The fossil evidences found in both sections are as follow:
Globotruncana ventricosa (White), Globotruncanita elevata (Brotzen)
Globotruncana arca (Cushman), Globotruncanita stuartiformis (Dalbiez)
Globotruncana bulb ides Volger, Gbobotruncana lapparenti Brotzen
Gbobotruncanita calcarata (Cushman), Gbobotruncana linneiana (d' Orbigny)

Subject List : Campanian-Maastrichtian