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Geological Survey published reports on Alaska, 1884-1914, indexed by quadrangle
Edward Huntington Cobb
1974, Open-File Report 74-345
Geological Survey reports published as Annual Reports, Monographs, Special Reports, Professional Papers, Bulletins, and Water Supply Papers are listed by the quadrangles (scale 1:250,000) into which Alaska has been divided for topographic mapping (p. 2). This index does not include any reports that deal solely with administrative matters.Reports that deal...
Bedrock geologic map of the Greenwood quadrangle, Marquette County, Michigan
William F. Cannon
1974, Geologic Quadrangle 1168
The Marquette Iron Range is presently ( 1973) the second largest iron mining district in the United States. Commercial iron deposits, now mostly concentrating-grade ore, are in the Negaunee Iron-formation, which is part of a thick sequence of metasedimentary rocks of Precambrian X age. These rocks are preserved in the...