The Teminan bentonite deposit is located in ~25 km southwest of Naeen, Isfehan Province. This deposit has layered and massive form and is an alteration product of tuff breccias of Oligo-Miocene age. Mineralogical data show that montmorillonite, heulandite, clinoptilolite, quartz, anorthite, orthoclase, calcite, beidellite, illite, and microcline are the principal rock-forming minerals in this d...