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1999. Rosenberg, Lewis I. This polygon shapefile contains the distribution of Mineral Resource Zones for Monterey County, California. Construction minerals such as sand, gra... Monterey County (Calif.). Planning Department.
2015. Garcia, Paul and Price, Matt. This polygon shapefile contains mineral resource areas as defined in the General Plan adopted May 24, 1994 for the County of Santa Cruz, California... County of Santa Cruz Information Services Department.
2001. United States. Minerals Management Service. This polygon shapefile shows the official protraction diagram (OPD) and leasing map boundaries for the United States, covering areas of the Outer C... Geological Survey (U.S.).