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, disseminated beryl in granite and rhyolite, hot spring deposits, and residual materials. Deposits of each type that have a total production plus reserve greater than 24,000 lbs. of contained Be0 (equivalent to 1200 short ton units of Be0 or 190 tons of beryl) are shown by a large symbol. Names are given only for the districts that are of particular economic or scientific importance. Both published information and unpublished data gathered by the U. S. Geological Survey were used in preparing the map and text.