The intrusions are similar in form and rock type to those in other Colorado Plateau mountain ranges, such as the Henry Mountains and the La Sal Range and the Abajo Mountains, all nearby in Utah, but the intrusions at these three Utah occurrences are about 20 to 30 million years in age. The Ute Mountains and the similar Carrizo Mountains, nearby in Arizona, lie within a southwest extension of the Colorado Mineral Belt, but no ore deposits are known to be associated with these igneous rocks.