November 2004 by StaffExcerpts from California Mining Journal, our original title, published 50 years ago this month.
In underground placer work, the contact point of the bedrock tunnel and the gravel is a very weak point and always has to be timbered. The bedrock here is thin, fractured, and the gravels loose from many years of oxidizing.
Colorado-Utah-Wyoming oil shale was first reliably discovered to contain gold and silver by the U.S. Bureau of Mines in the 1920s. Although most of this vast shale resource, up to 1,000 feet in thickness, contained nil or barely detectable values, many brown shale samples fire assayed here over the past thirty years have yielded up to 0.02 ounces per ton (opt) Au and 2.0 opt Ag.
Queensland produces about 25-28 tons of gold per year, which, while not in the same class as South Africa or North America, is still a respectable output.
Located about thirty miles west of Delta, Utah, just to the north of Highway 6-50, is a tall rocky crag with an apparent notch missing from the peak. This is Notch Peak.
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