Transactions . ements or fracturing after the ore was de-posited. It is interesting to note the increasing percentage of bismuthin the ores of the upper levels (from 300 ft. to 500 ft. in depth)of the mines on the line of the main fracturing, from those onthe south and highest in elevation to those on the north and onlower ground. In the Congress mine on the extreme southand near the divide, the ores are almost entirely down the valley the Hudson and St. Lawrenceores show appreciable quantities of bismuth, which increase inthe Genesee-Vanderbilt, Guston, and Silver Bell min
Transactions . ements or fracturing after the ore was de-posited. It is interesting to note the increasing percentage of bismuthin the ores of the upper levels (from 300 ft. to 500 ft. in depth)of the mines on the line of the main fracturing, from those onthe south and highest in elevation to those on the north and onlower ground. In the Congress mine on the extreme southand near the divide, the ores are almost entirely down the valley the Hudson and St. Lawrenceores show appreciable quantities of bismuth, which increase inthe Genesee-Vanderbilt, Guston, and Silver Bell mines, in theorder named. The latter property produced massive bodies ofore high in bismuth, and carrying from 500 to 1,000 oz. ofsilver per ton. The ores of the Yankee Girl mine are not in-cluded in this comparison, being to the west of the main frac-turing mentioned; however, they carried but little of the bis-muth minerals. 5 Op. cit, p. 218. 6 Op. c&, p. 108. 36 OCCURRENCE OF ORE AT RED MOUNTAIN, Fig. 2.—Section of Main Chimneys in Yankee Girl Mine. OCCURRENCE OF ORE AT RED MOUNTAIN, COLORADO. 37 Surface YANKEE GIRL MINE and Chimneys 6th Level STRONG 1/. CLAY
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
