Jadeitized Franciscan metamorphic rocks of the Pacheco Pass-San Luis Reservoir area, central California Coast Ranges
Published:January 01, 1987
W. G. Ernst, 1987. "Jadeitized Franciscan metamorphic rocks of the Pacheco Pass-San Luis Reservoir area, central California Coast Ranges", Cordilleran Section of the Geological Society of America, Mason L. Hill
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The Pacheco Pass-San Luis Reservoir area is located in the central Diablo Range along the crest and eastern flank of the uplift. The site is transected by California State Highway 152, a four-lane, divided roadway near and east of the summit (elevation 1,368 ft; 410 m). The area is situated about 120 mi (200 km) southeast of San Francisco and 285 mi (450 km) northwest of Los Angeles. The location is illustrated in Figure 1. Access is provided by Highway 152, and a portion of the former road; four of the six outcrops referred to in this report are roadcuts. Because of heavy automobile and truck traffic on Highway 152, special care must be exercised when examining the rocks, and vehicles should be parked in turnouts or on the shoulder well off the pavement.
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Cordilleran Section of the Geological Society of America
One of six volumes generated by each GSA section for the Decade of North American Geology (DNAG) project, this Centennial Field Guide contains descriptions of 100 sites or site clusters representing outstanding geologic locations in Alaska, southern Arizona, California, Hawaii, Nevada, Oregon, Washington, and British Columbia.