Geologic Maps and Structure Sections of the Southwestern Santa Clara Valley and Southern Santa Cruz Mountains, Santa Clara and Santa Cruz Counties, California
Geologic maps and structure sections of the southwestern Santa Clara Valley and southern Santa Cruz Mountains, Santa Clara and Santa Cruz Counties, California By R.J. McLaughlin1, J.C. Clark2, E.E. Brabb1, E.J. Helley1, and C.J. Colón3 Pamphlet to accompany Miscellaneous Field Studies Map MF-2373 2001 U.S. Department of the Interior U.S. Geological Survey 1U.S. Geological Survey, 345 Middlefield Rd., Menlo Park, CA 94025 2Indiana University of Pennsylvania, Indiana, PA 15705 3Stanford University, Stanford, CA 94305 U.S DEPARTMENT OF THE INTERIOR TO ACCOMPANY MF-2373 U.S. GEOLOGICAL SURVEY GEOLOGIC MAPS AND STRUCTURE SECTIONS OF THE SOUTHWESTERN SANTA CLARA VALLEY AND SOUTHERN SANTA CRUZ MOUNTAINS, SANTA CLARA AND SANTA CRUZ COUNTIES, CALIFORNIA By R.J. McLaughlin, J.C. Clark, E.E. Brabb, E.J. Helley, and C.J. Colón INTRODUCTION This report depicts the geologic framework and structure of the San Francisco Bay region in the vicinity of southwestern Santa Clara Valley and the southern Santa Cruz Mountains. The maps encompass parts of Santa Clara and Santa Cruz Counties and include new and revised geologic mapping of the Los Gatos, Santa Teresa Hills, Laurel, Loma Prieta, and Mount Madonna 7.5' quadrangles and parts of the Morgan Hill and Gilroy 7.5' quadrangles. The mapping was carried out under the National Cooperative Geologic Mapping and Earthquake Hazards Reduction Programs of the U.S. Geological Survey between 1988 and 1997 as part of projects to map the geology of the 1:100,000 San Jose quadrangle (fig. 1) and to investigate the geology of the epicentral region of the October 17, 1989 Loma Prieta Earthquake.
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