This dataset depicts mineral resources in Washington, including locations of mineral occurrence, past and current mineral
producing sites, prospecting sites, and mineral processing plants. This database contains the records previously provided
in the Mineral Resource Data System (MRDS) of USGS and the Mineral Availability System/Mineral Industry Locator System (MAS/MILS)
originated in the U.S. Bureau of Mines, which is now part of USGS. The MRDS is a large and complex relational database developed
over several decades by hundreds of researchers and reporters. This product is a digest in which the fields chosen are those
most likely to contain valid information.