 | | Report (issue) | | Mountain-type Au-Ag polymetallic veins, Blue Mountains, Oregon, for use in resource and environmental assessment...Mountain-type Au-Ag polymetallic veins of eastern Oregon can be used: (1) to characterize the gold and silver...maximum depths, target areas, and overall lengths of mine workings for use in environmental assessment. The...target area of 160 hectares (fig. 8). Depth of mining in known deposits range from 31 to 915 m. The geometric... Eighty percent of the deposits have subsurface mine workings lengths between 1,100 and 5,900 m (fig |  | | Journal (article/letter/editorial) | | gneiss, soapstone, Cranberry granite, Blowing rock granite, and Beech granite. The Carolina gneiss is the...same age. The Cranberry granite is the most extensive formation in the district, occurring chiefly in the...mountain districts. It consists of granite and of schist derived from granite, and cuts the Roan gneiss and...are cut by the Blowing rock gneiss and the Beech granite, which are considered to be of the same age. Four...WATSON. " Copper-bearing Rocks of Virgilina Copper District, Virginia and North Carolina." Bulletin of the |  | | Report (issue) | | description of the geology, mining history, and production of the major gold-mining districts in 21 States...relations ---------------------------History of gold mining and trends in production_ J\labama -----------...--------------Cleburne County ----------~----------------- Tallapoosa County --------------------------Alaska...------------------Cochise County -----------------------------Gila County --------------------------------Greenlee...ee County ----------------------------R[aricopa County ----------------------------R[ohave County -- |  | | Report (volume) | | Wisconsin___ Central and eastern Minnesota r Mesabi district _____________________-__ Vermilion district__...the Woods and Rainy Lake___________ Michipicoten district _,___________________ 108 108 108 178 ITS 196...series__________________________ 335 Marquette district _____________________ 335 Crystal Falls distr...Wisconsin____________________ 338 Chippewa River and Barron County ___________ 338 Central Minnesota ______________________...Superior ____________________^_________ Michipicoten district _______________________ Keweeuawan series _________________ |
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