Background Information to Accompany the Atlas of Some Metal and Nonmetal Mineral Provinces in the Conterminous United States Circular 792
Washington, D.C. USGS, 1980. stapled binding, 10.25" Tall, cover clean, 15 pages. The principal purpose of this companion report to the atlas of metal and nonmetal mineral provinces is to discuss the rationale for making the maps, the methodology used in their construction, their characteristics and use, the serious gaps..... More



