GIS Data
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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.
Lode gold and silver occurrences in Alaska Lode gold and silver occurrences in Alaska
No abstract available.
Magnesite and brucite in the United States, exclusive of Alaska and Hawaii Magnesite and brucite in the United States, exclusive of Alaska and Hawaii
The important deposits of magnesite (MgCO3) and brucite (MgO.H2O) in the United States (exclusive of Alaska and Hawaii) are shown on the accompanying map. Single deposits and groups of deposits are shown by geometric symbols according to four size categories based on estimated production plus reserves. These categories are: less than 10,000 tons, 10,000 to 100,000 tons, 100,000 to 1,000...
Manganese in the United States, exclusive of Alaska and Hawaii Manganese in the United States, exclusive of Alaska and Hawaii
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 rocks, and epigenetic, in which manganese was...
Mercury in the United States, exclusive of Alaska and Hawaii Mercury in the United States, exclusive of Alaska and Hawaii
This map shows the location of mercury districts and deposits in the United States (exclusive of Alaska and Hawaii). The map was compiled from published reports and from data in the files of the Geological Survey. All map locations are numbered consecutively in each state and names, geographic coordinates, and selected references are given in the Index.