USGS - science for a changing world

Mineral Resources On-Line Spatial Data

Prospect- and mine-related map features

Symbols indicating mining-related features digitized from historical USGS topographic maps, includes prospect pits, mine shafts and adits, quarries, open-pit mines, gravel and borrow pits. Select and Download here
legend for points from 1:24,000 scale maps

Accessibility FOIA Privacy Policies and Notices

USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: Peter Schweitzer
Page Last Modified: Tuesday, 11-Jul-2017 14:59:56 MDT