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This view is looking south from Boulder Beach toward Promontory Point. Hoover Dam is on the south side of this massive ridge that consist of middle Miocene-age volcanic rocks. Mount Wilson in the distance is a high peak at the north end of the Black Mountains in Arizona; elevation 5,445 feet (1660 m). The peak is part of the Mount Wilson Wilderness Area and is underlain by Precambrian-age gneiss and schist, and a Tertiary-age pluton that formed about 13.5 million years ago. The mountainous area then rose in the last 10 million years along faults along the flanks of the uplift. |
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