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mineral gold ore separating line

mineral gold ore separating line

mineral gold ore separating linein Pittsburgh USA North America,At the time these mines were surveyed 59 mines in Pennsylvania were observed to have ore mineralization in an outcrop shallow pit or isolated drill holeknown as an occurance mine 1 Pennsylvania has 63 prospect mines 2 1020 mines were in production at the time the data was entered into USGS records

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