Geologic map of the Granite Peak and Sapphire Mountain Area, U.S. Army Dugway Proving Ground, Tooele County, Utah (M-238) Media Type:PLOT Interstate Highway 15 extends from

Interstate Highway 15 extends from northeast to southwest through the map area

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Stan’s Notes – naturalist information and interesting gee-whiz facts not found in other guides

5' quadrangle extends from the cities of St

Geologic map of the Granite Peak and Sapphire Mountain Area, U.S. Army Dugway Proving Ground, Tooele County, Utah (M-238) Media Type:PLOT Interstate Highway 15 extends fromBy: D. L. Clark, R. F. Biek, G. C. Willis, K. D. Brown, P. A. Kuehne, J. B. Ehler, and C. L. Ege Granite Peak and Sapphire Mountain are range blocks composed of igneous and metamorphic rocks located on the southeast margin of the Great Salt Lake Desert in the northeastern Great Basin. These mountains are unique, in part because they have undergone relatively little detailed geologic study as a result of their location within the U. S. Army Dugway