Geology of the River Mountains

<h4><span style=font-size:16px>Volcanoes?</span></h4> <span
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Volcanoes?

This phrase will certainly get the attention of many, particularly those who are not familiar with the geology of the River Mountains. This certainly explains why they are so rugged!

The River Mountains are composed of tilted and faulted mid-Miocene (15 to 12 million years old) andesite and dacite lava flows. Two volcanoes, the source of most of the lava, have been identified in the River Mountains.

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River Mountains Loop Trail 1000 Rancho Circle Las Vegas, NV 89107-4623 702-880-3557

The River Mountains Loop Trail is a 35-mile loop trail around the River Mountains. It is for hiking, biking, running, jogging, horse back riding and other non-motorized uses.

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