The younger cones of this region are steep sided and relatively unweathered but the older cones are deeply cut by gullies that expose agglutinate and feeder dikes. In addition to its cones and flows, Cima field is also known for its abundance of mafic and ultramafic xenoliths. Cima's cinder cones are polygenetic in character, in that at least four of its Pleistocene cones have erupted off and on over periods as great as several hundred thousand years.
These cones of Cima are located off Kelbaker Rd between Interstate 40 and Interstate 15. This area which is about 68 miles (110 km) southwest of Las Vegas, Nevada, and 93 miles (105 km) northeast of Barstow, California can get very hot during the summer months, temperatures there can reach up to 115 degrees F +.
Wood, Charles A., Jurgen Kienle, eds; 1990 [John C. Dohrenwend] Volcanoes of North America: United States and Canada, Cambridge University Press, p.240-241.
Photos Courtesy Mike De Marquette
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