UC Berkeley GeoData Repository

Start Over Subject Sand and gravel mines and mining Bounding Box -180 -89.81531 180 89.456192

1. Sand and Gravel Operations in the United States

2002. Geological Survey (U.S.) Minerals Information Team. This point shapefile includes sand and gravel operations in the United States. These data were obtained from information reported voluntarily to th... National Atlas of the United States.

2. Map of the principal quartz and gravel mines in Tuolumne County, California

by J. P. Dart Mining Engineer. Coordinates approximate and based on Greenwich meridian. Compass rose. "One mile to one inch." Shows waterways, sett...