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Bureau of Mines / Minerals yearbook: Metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)

Morning, John L.
Technologic trends in the mineral industries (metals and nonmetals except fuels),   pp. 61-82 PDF (1.8 MB)


Page 72

Table 6.—Crude ore and total material handled at surface and underground
mines, 
by State, in 1972 
(Percent) 
Crude 
State 
Surface 
ore 
Underground 
Total material 
Surface 
Underground 
2 
4 
2 
1 
35 
2 
5 
3 
2 
4 
11 
14 
17 
1 
7 
31 
1 
4 
1 
13 
6 
6 
2 
5 
9 
13 
1 
4- 
4 
I 
15 
I 
5 
72TotalMINERALS YEARBOOK, 1972 
Alabama 
Alaska 
Arizona 
Arkansas 
California 
Colorado 
Connecticut 
Delaware 
Florida 
Georgia 
Hawaii 
Idaho 
Illinois 
Indiana 
Iowa 
Kansas 
Kentucky 
Louisiana 
Maine 
Maryland 
Massachusetts 
Michigan 
Minnesota 
Mississippi 
Missouri 
Montana 
Nebraska 
Nevada 
New Hampshire 
New Jersey 
New Mexico 
New York 
North Carolina 
North Dakota 
Ohio 
Oklahoma 
Oregon 
Pennsylvania 
Rhode Island 
South Carolina 
South Dakota 
Tennessee____________________________ 
Texas 
Utah 
Vermont 
Virginia 
Washington 
West Virginia 
Wisconsin 
Wyoming 
 98 2 98 
 100 - - 100 
 88 12 96 
 98 2 98 
 99 1 99 
 66 34 65 
 100 - - 100 
 100 - - 100 
 100 - - 100 
 98 2 98 
 100 -- 100 
 91 9 95 
 97 3 97 
 98 2 98 
 96 4 96 
 89 11 89 
 86 14 86 
 83 17 83 
 99 1 99 
 100 -- 100 
 100 -- 100 
 92 8 93 
 100 - - 100 
 100 -- 100 
 70 30 69 
 98 2 99 
 96 4 96 
 100 -- 100 
 100 -- 100 
 99 1 99 
 66 34 87 
 94 6 94 
 100 -- 100 
 100 -- 100 
 94 6 94 
 97 3 98 
 100 - - 100 
 95 5 95 
 100 - - 100 
 100 - - 100 
 92 8 91 
 86 14 87 
 100 -- 100 
 99 1 99 
 96 4 96 
 97 3 96 
 99 1 99 
 85 15 85 
 99 1 9' 
 78 22 96 
 94 6 96 4 


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