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Geology of the Leupp quadrangle, Arizona Geology of the Leupp quadrangle, Arizona
No abstract available.
Geology of the Manati quadrangle, Puerto Rico Geology of the Manati quadrangle, Puerto Rico
No abstract available.
Gold in the United States, exclusive of Alaska and Hawaii Gold in the United States, exclusive of Alaska and Hawaii
The accompanying map shows the distribution of the principal gold mining districts in the United States (excluding Alaska and Hawaii). Only those districts that have produced 10,000 ounces of gold or more are shown. Gold ore reserves were not considered, and the types of deposits are not shown. Based on total output, the gold-producing districts have been classified into three categories...
Gypsum and anhydrite in the United States, exclusive of Alaska and Hawaii Gypsum and anhydrite in the United States, exclusive of Alaska and Hawaii
The distribution of gypsum and anhydrite in the United States (exclusive of Alaska and Hawaii) is shown on the accompanying map. In addition to mines, open pits, and occurrences, the map shows the outcrop patterns of gypsum-bearing fomations and other outlines of the important evaporite basins in which gypsum and anhydrite might be found. Because of the numerous factors involved in...
Lead in the United States, exclusive of Alaska and Hawaii Lead in the United States, exclusive of Alaska and Hawaii
The productive lead districts in the United States (exclusive of Alaska and Hawaii) are shown on the accompanying map. The map is at a scale of 1: 3,168,000, (50 miles to the inch). Only those districts known or believed to contain 1,000 short tons or more of lead are shown; individual deposits within districts are not represented.