An iron exploration conducted by the M. A. Hanna Co. during 1931 in SE Sec. 31 T43N-R31W and in NW Sec. 5 T42N-R31W, within the old Glidden and Scadden explorations. Nineteen holes were drilled into the Mansfield iron-bearing slate member of the Hemlock Volcanics formation.
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Localities in this Region
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
Bayley, R. W. (1959) "Geology of the Lake Mary Quadrangle, Iron County, Michigan." U. S. Geological Survey Bulletin 1077, U. S. Government Printing Office, Washington, p. 106, pls. 1, 5.
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Locality Updated: Challenge deposit, Emerald Lake Hills, San Mateo Co., California, USAFrom Brent Thorne, 7th Dec 2013 23:31:03