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Pediments
April 2005 by Edgar B. Heylmun, PhD
A pediment is a broad, gently sloping erosion surface or plain of low relief that is often found in arid and semi-arid regions at the base of a receding mountain front. The example shown is from the Palo Verde Ranch 15-minute topographic quadrangle, southwest of Tucson, Arizona. This is one of the best examples the writer has ever seen.Looking Back
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
The Value of Evidence
That prospecting effort you are about to spend your time on...is it worth your effort? If you are going to devote your time to it, you will need all the facts you can get.
Ask The Experts—Columbium/Niobium
Q: I have samples that have assayed 45-75% columbium/niobium. What is it used for? Do you know anyone who is actively processing this ore? Where should I go from here?
Recent Prospecting in Plumas County
Plumas has been historically rich in gold because of its favorable geology. The Melones Fault trends north-south through the county and many rich gold-bearing districts lie along its course.
The Iola Mine Group, Montgomery County, North Carolina
The Iola mine group is made up of four once active gold mines, the Iola, Washington, Golconda and Uwarra gold mines. Although this group of mines were some of the most productive gold mines in North Carolina for a number of years, and according to published records, some of the best managed, they had a relatively short life span for reasons unknown.
Legislative and Regulatory Update
• BLM claim fees rise.
• Miners win in Karuk Tribe of California v. USFS
Melman on Gold & Silver
…we cannot ignore the fact that several of the most widely-followed and respected economic voices are now raising questions about the potential near-term development of a full-blown market panic.
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The Bawl Mill
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