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

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Page Last Modified: Tuesday, 11-Jul-2017 14:59:56 MDT