Study of main planktonic foraminifera(Turonian-Santonian) in Kopeh-Dagh sedimentary environment, NE Iran

Type section of Abderaz Formation has 500m thickness (E: 60, 33, 00, N: 36, 10, 40) NE Mashhad (a city of Iran), placed in Mashhadsarakhs road far about 1 km to the Muzduran (Figure 1). 2.1.1. Stratigraphy of the study area Abderaz Formation is one of the upper cretaceous formations at the Eestern-North of Iran. This formation at the typical gap has 500 meters thickness and contains 11 lithological units (Figure 2). At the typical gap such as all regions under the surface sub-contact of Abderaz Formation are un-correlated with Aitamir Formation. But its upper layer with Abtalkh Formation is in continuous correlation. The upper layer has elected as chalk limestone upper border. The sub-border of the formation is the common border of silvery shale with olive shale of Aitamir Formation. This boundary is at good health distinguishable in the air plan images. This formation due to shale and marls lithology,the drainage outline at the formation has formed as dendrites and badland formations has observed into it frequently. Sustainable Earth Review