عنوان مقاله [English]
Gorges are considered ont of the most attractive and complicated phenomena in geomorphology. Their Complexities have led to some hypotheses about their formation. Some of these hypotheses are considered classics of the field now.
In this research, many methods have been employed in studying of the transverse valley of Tang-Takab, such as topographic and geologic maps and aerial-photos.The valley is located in anticline of khaviz in northeast of Behbahan. In surveying the area, several observations were made. We tried to clarify how these gorges were formed in the late cretaceous (Goorpi construction) Ecocene (pabdeh construction) Oligo – Miocene (Asmany calcareous construction) accompanied with Quaternary alluviums. Based on new hypotheses, the progress of formation of gorges in the transverse valley of Tang Takab became clear. The processes are active in changing a vast area in zagrus mountain. Therefore, for interpretation of this phenomenon there is no need to draw on mechanisms, accidents or hypotheses. It should be noticed that formation of transverse valley of Tang-Takab is not related to only one specific process, but to several factors which have happened simultaneously