All Articles
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.
Blue Collar Prospector Goes Big In Eldorado County!
January 2024Mining Stock Quotes and Mineral & Metal Prices
Gold, Quartz & Chalcedony—Part II
The specific gravity of chalcedony is 2.58 to 2.64. This is slightly lower than coarsely crystalline quartz because of slight porosity in chalcedony. Being so light, it will easily wash out of a gold pan.
Over The Divide: Jim Straight, 1930-2019
How to Make a Rock Sled for Dredging
When my “anonymous” friend told me the rock tub was probably a hundred miles from where he safely stashed it, I decided to build another sled and improve on my old design.
Havin' Fun at the Uranium and Gold Mines
June 2023All About Hard Rock Drills
There are three basic power sources for rock drills—electricity, gasoline and compressed air. Before we go into big pneumatic drills, we’ll start with a quick rundown of each.
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The Bawl Mill
• What's In A Name?
• Our Readers Say
• BLM Swindles War Hero Out of Gold Mine
• The River Runs Through It
• DEF Has Another Successful Year
• Fellow Miner, Left for Dead, Needs Our Help
• PGMs in California
• Picks & Pans: The Professional Nuggetshooter
• Company Notes
• Gold in the First Pan
• Looking Back
• Cedros Island, Mexico
• The Eagle and High Peak Mines of Julian, California
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
