GIS Data
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Red iron-ore beds of Silurian age in northeastern Alabama, northwestern Georgia, and eastern Tennessee Red iron-ore beds of Silurian age in northeastern Alabama, northwestern Georgia, and eastern Tennessee
Mining and smelting of iron ore in Alabama, northwestern Georgia, and eastern Tennessee date almost to Revolutionary War days, bus substantial production in the Southeast was not attained until after 1850. Numerous furnaces were erected int the region, especially in and near Birmingham, Ala., which is still the principal iron and steel-making center of the area. Locally mined iron ores...
Silver in the United States, exclusive of Alaska and Hawaii Silver in the United States, exclusive of Alaska and Hawaii
The productive silver districts in the United States (exclusive of Alaska and Hawaii) are shown on the accompanying map. Only those districts known or believed to have contained 100,000 troy ounces or more silver are shown. Three size categories, based on production and estimated reserves, are distinguished and indicated by size of symbols: districts containing 100,000 to 5 million...
Talc and soapstone in the United States, exclusive of Alaska and Hawaii Talc and soapstone in the United States, exclusive of Alaska and Hawaii
The locations of talc and soapstone deposits in the United States (exclusive of Alaska and Hawaii) arc shown on the accompanying map. The two types are distinguished by the shape of symbols; the relative importance of the deposits, expressed in broad ranges of tonnage, is indicated by the size of symbols. Two persistent belts in the Southeastern States are shown by patterns, and the...
Thorium and rare earths in the United States, exclusive of Alaska and Hawaii Thorium and rare earths in the United States, exclusive of Alaska and Hawaii
The accompanying map shows the location of the principal deposits of thorium and rare-earth minerals in the United States (excluding Alaska and Hawaii). Symbols of different shapes are used to depict deposits of different geologic types, and sizes of symbols denote the relative importance of the deposits. Because of scale limitations a symbol may represent groups of deposits too closely...
Titanium in the United States, exclusive of Alaska and Hawaii Titanium in the United States, exclusive of Alaska and Hawaii
The accompanying map shows the location of the principal deposits of titanium minerals in the United States (excluding Alaska and Hawaii). Four broad geologic categories of deposits have been distinguished on the map by the shapes of the symbols, and relative importance is indicated by their size. The smaller deposits and the deposits for which adequate data are lacking can only be rated...