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Paleoplacers in the Black Hills
September 2002 by Edgar B. Heylmun, PhD
The Black Hills of western South Dakota are domal mountains that rise to 7,242 feet near Mt. Rushmore National Monument. Annual precipitation reaches 28 inches, enough to support winter sports and pine forests.
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Mining Stock Quotes and Mineral & Metal Prices
August 2016
Quartz and Chalcedony in Wyoming
June 1999
Quartz is a common rock-forming mineral found in many shapes, forms, and colors.
Quartz is a common rock-forming mineral found in many shapes, forms, and colors.
The Bawl Mill
July 2009
• Too little, too late...
• Beware of Argentina...just kidding!
• A million dollars just doesn’t go as far as it used to...
• Well qualified
• Too little, too late...
• Beware of Argentina...just kidding!
• A million dollars just doesn’t go as far as it used to...
• Well qualified
The Fire Assay of Fly Eyes
July 2002
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.
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.
River Dredging vs. Creek Dredging—Part II
January 2012
While river dredging in fast water, don’t be afraid of being swept out of your dredge hole by the current. If this happens—and it most certainly will in fast water—there is no need to panic. Don’t try to swim against the current because you will waste much energy in an effort to conquer the river. Just let it take you downstream.
While river dredging in fast water, don’t be afraid of being swept out of your dredge hole by the current. If this happens—and it most certainly will in fast water—there is no need to panic. Don’t try to swim against the current because you will waste much energy in an effort to conquer the river. Just let it take you downstream.
One of the Richest Beaches Ever Mined
April 2015
Everyone has heard of the golden beach at Nome, but Nome did not have the richest beach.
Everyone has heard of the golden beach at Nome, but Nome did not have the richest beach.
Legislative Update
May 1999
Robert Sanregret—Attorney at Law
Western Mining Council
National Association of Mining Districts
Robert Sanregret—Attorney at Law
Western Mining Council
National Association of Mining Districts
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The Bawl Mill
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