Volcanoes of the McCullough Range, southern Nevada
Published:June 01, 2010
Eugene Smith, Denise Honn, Racheal Johnsen, 2010. "Volcanoes of the McCullough Range, southern Nevada", Miocene Tectonics of the Lake Mead Region, Central Basin and Range, Paul J. Umhoefer, L. Sue Beard, Melissa A. Lamb
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The McCullough Range preserves a unique record of Miocene volcanism in the western Lake Mead area of Nevada. The basal part of the volcanic section is composed of interbedded basalt and dacite of the McClanahan Spring, Cactus Hill, and McCullough Wash volcanoes (Eldorado Valley volcanic section), and the Colony volcano, which is age-equivalent to, but does not crop out within, the Eldorado Valley volcanic section (18.5–15.2 Ma). These units lie on Precambrian basement and locally on the Peach Springs Tuff (18.5 Ma). Over 400 m of andesite lava, agglomerate, and breccia of the Farmer Canyon volcanic section forms the McCullough...