عنوان مقاله [English]
KhorosloDaghlocated in northwestern of Iran and south of Moghan plain in Ardabil province. These mountainsare from Azarbyjan mountains unit and are separated from Caucasus and Talesh Mountains in Azarbyjan republic. Study area was folded by upper Pliocene and Quaternary orogeny. Pliocene orogeny was severe but Quaternary folded was calm. Afterward orogeny movements and folding, invertedrelief (specially hanging synclinals) has been formed by erosion. Apart of hydrographic network are adjustment with construction but some of drainage are notÂ Â agreement with structure geology.Â This disagreeing is interpret by Antecedence theory because this area has been a subsidence area, before Khoroslo Mountain forming, has been deposited from Eocene until Pliocene. In south of this area existence Meshghen- Ahar uplifted zone and rivers stream from this uplifted area toward north (Moghan and Araxs river). Study area in Pliocene and Quaternary orogeny (KhorosloDagh) has been uplifted and rivers continue to drilling activity this activity has been the cause of cutting previous direction and created narrow valleys in the area.