scrutiny of geology formation's sensitivity to erosion (case study: Hamand Nehbandan basin)

Iran’s climate with other factors cause to a lot of erosion in country area and based on soil value as vegetation productive bed, necessity and importance of this study will be cleared. The Hamand basin is located from 59˚ 54̒ to 60˚ 02̒ eastern longitudes and 31˚ 36̒ to 31˚ 37̒northern latitudes. This place is located in south of Khorasan province and northwest of Nehbandan and west of Hamand village. In this study, geology and fault maps with scale of 1/50000 obtained by incorporation of photogeology method and visual interpretation of satellite pictures and field survey. The oldest and widest stratification unit is Eocene formation like Andezite, Dacite and Ryolite. In this study by use of Faiznia method(1995) lithology units classified based on their sensitivity to erosion that most sediment produced by ouedes bed sediment, then shill and metamorphic sandstone of Eocene and the least ability of sedimentation belongs to Andezite and basalt.

formation, erosion, photogeology, geology map