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Asbestos in the United States, exclusive of Alaska and Hawaii Asbestos in the United States, exclusive of Alaska and Hawaii
The asbestos deposits in the United States (exclusive of Alaska and Hawaii) are shown on the accompanying map. The principal mineralogic types of asbestos (chrysotile and amphibole) are indicated by the shape of symbols, and the relative importance of the deposit is indicated by the size of symbols. The text lists localities by State by numbers that are keyed to the map. Localities are
Beryllium in the United States, exclusive of Alaska and Hawaii Beryllium in the United States, exclusive of Alaska and Hawaii
This map shows most of the known occurrences of beryllium minerals and of rocks that contain 0.003 percent or more beryllium (0.01 percent Be0) in the United States (exclusive of Alaska and Hawaii). The occurrences are subdivided on the map according to genesis and size. The genetic types of deposits shown are: pegmatite, vein and replacement deposits (exclusive of tactite), tactite...
Bismuth in the United States, exclusive of Alaska and Hawaii Bismuth in the United States, exclusive of Alaska and Hawaii
The bismuth-bearing deposits in the United States (exclusive of Alaska and Hawaii) are shown on the accompanying map. In compiling the map the deposits were classified into two categories: 1) those that have produced bismuth or are regarded as potential sources based on available information (in general, this category includes the minable base- and precious-metal depos its whose ores or
Borates in the United States, exclusive of Alaska and Hawaii Borates in the United States, exclusive of Alaska and Hawaii
This map shows the location of borate deposits in the United States (exclusive of Alaska and Hawaii). Because all the known borate deposits of the United States of any historic or present economic importance occur in California, western Nevada, and southern Oregon, this map covers only the western part of the country.
Chromite in the United States, exclusive of Alaska and Hawaii Chromite in the United States, exclusive of Alaska and Hawaii
The chromite deposits in the United States (exclusive of Alaska and Hawaii) are shown on the accompanying map. In compiling the map, the deposits were classified in five size categories according to the estimated total quantity of chromite present before mining. The map shows, by different symbols, deposits of chromite in ultramafic rocks, beach sands in which chromite is an important...
Copper in the United States, exclusive of Alaska and Hawaii Copper in the United States, exclusive of Alaska and Hawaii
The copper districts in the United States (exclusive of Alaska and Hawaii) are shown on the accompanying map. In compiling the map, the estimated total quantity of copper present before mining was used to assign districts to size categories, and both production and reserves are included without distinction as to the status of exploitation. Four categories have been distinguished...