A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Methods and cost of mining hematite at the Eureka-asteroid mine on the gogebic range, gogebic county, mich
Mine at Ramsay, Mich.; history; alternate layers of cherty and slaty horizons on quartzite footwall with siliceous slate hanging wall; ore and rock characteristics; prospecting and exploration; sampling; mining methods; underground transportation; ventilation and safety; costs.
Methods and cost of mining hematite at the Eureka-asteroid mine on the gogebic range, gogebic county, mich
Mine at Ramsay, Mich.; history; alternate layers of cherty and slaty horizons on quartzite footwall with siliceous slate hanging wall; ore and rock characteristics; prospecting and exploration; sampling; mining methods; underground transportation; ventilation and safety; costs.
Methods and cost of mining hematite at the Eureka-asteroid mine on the gogebic range, gogebic county, mich
U. S. Bur. Mines -- Information Cir
Scahus, O.M. (author)
1930
13 pages
6 Figs. on supp. plates
Report
English
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