Significant metalliferous lode deposit locations as determined by the U.S. Geological Survey and published in U.S.G.S. Bulletin 1786 (1987). The term "significant deposits" is defined as all metalliferous mines, prospects, deposits, or occurrences that the authors and contributors judge to be important, on the basis of size, geological importance, or interest.

Key variable

COMMODS: deposit types using standard chemical element symbols Ag (silver), Au (gold), Cr (chromium), Cu (copper), Pb (lead) and also Coal