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Manganese in the United States, exclusive of Alaska and Hawaii
Max D. Crittenden, Louis Pavlides
1962, Mineral Investigations Resource Map 23
The manganese deposits in the United States (exclusive of Alaska and Hawaii) are shown on the accompanying map. The deposits have been divided into several genetic types distinguished on the map by symbols. The principal distinction is between syngenetic deposits, in which the manganese was deposited contemporaneously with the enclosing...
Asbestos in the United States, exclusive of Alaska and Hawaii
A.H. Chidester, A. F. Shride
1962, Mineral Investigations Resource Map 17
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...