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Note: This information is provided for reference purposes only. Although the information provided here was accurate and current when first created, it is now outdated. All the links in the document have been removed. |
![]() Hardrock Mining
Maps The following maps illustrate the location of major base metal, precious metal, and industrial rock and mineral producing areas in the United States. These maps are based on 1996 USGS data. Images have been removed due to
broken links.
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