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Books Books 1 - 3 of 3 on ... pyrites, while the country rock consists of gneisses. It will be seen at once....  
" ... pyrites, while the country rock consists of gneisses. It will be seen at once that the great value of these ores lies in the ease with which the gold can be extracted. I shall describe these mines more in detail in a subsequent portion of this report... "
Atlantic City gold mining district, Fremont County - Page 79
by Loyal Wingate Trumbull - 1914 - 100 pages
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Report Upon the Reconnaissance of Northwestern Wyoming: Including ...

United States. Army. Corps of Engineers, William Albert Jones, Stanhope English Blunt, Theodore Bryant Comstock, Charles Lawrence Heizmann, Charles Christopher Parry, Joseph Duncan Putnam - Botany - 1875 - 331 pages
...rendered and without hesitation. The gold of this region occurs in thick veins of impure quartz among the schists and gneissic slates of the northeastern side of the anticlinal. The greater portion is disseminated through the matrix, but it not unfref|tieutly is found in cavities in the quartz in...
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report upon the reconnaissance of northwestern wyoming

william a. jones - 1875
...rendered and without hesitation. The gold of this region occurs in thick veins of impure quartz among the schists and gneissic slates of the northeastern side of the anticlinal. The greater portion is disseminated through the matrix, but it not unfrequently is found in cavities in the quartz in fair-sized...
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