Hubehebe Crater. photo prdcz 1999. This USA crater was formed when magmamigrated close to the surface and the heat of the magma flashed groundwater into steam, throwing large quantities of pulverized old rock and new magma across the stonyalluvial fandraped across the valley floor. The magma rose through a fault that lies along the western base of Tin Mountain. Movement on this fault was responsible for uplift of the entire Cottonwood mountainrange.