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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.Additional articles that might interest you...
Placer Gold in the Ortiz Mountains
January 2009
New Mexico’s Ortiz Mountains rise in irregular volcanic peaks above the surrounding plains, or llano, some 30 miles northeast of Albuquerque and about 14 miles to the south of my home outside the state capital of Santa Fe.
New Mexico’s Ortiz Mountains rise in irregular volcanic peaks above the surrounding plains, or llano, some 30 miles northeast of Albuquerque and about 14 miles to the south of my home outside the state capital of Santa Fe.
Legislative and Regulatory Update
October 2015
• Anti-dredging bill SB 637 passes
• Anti-dredging bill SB 637 passes
The Bawl Mill
October 2011
• By the numbers...
• National Debt
• By the numbers...
• National Debt
Looking Back
December 1999
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
Prospector's Guide to Rock Breaking and Blasting
December 2016
The holes were overloaded with explosives, but I didn’t know it. I was just a green mining engineer fresh out of school and told to watch as the experienced miners set the charge.
The holes were overloaded with explosives, but I didn’t know it. I was just a green mining engineer fresh out of school and told to watch as the experienced miners set the charge.
Legislative and Regulatory Update
December 2001
• State officials rip EPA plan for Coeur d'Alene Basin
• Judge keeps parts of suit over cyanide ban alive
• Change in arsenic standard will be felt in rural areas
• State officials rip EPA plan for Coeur d'Alene Basin
• Judge keeps parts of suit over cyanide ban alive
• Change in arsenic standard will be felt in rural areas
Time Well Spent
January 2012
Time is a commodity which if traded would dwarf the price of gold. Nobody has enough of it; we can’t make more of it; and whether squandered or spent wisely, once gone, it’s gone forever. To find gold we have to spend time.
Time is a commodity which if traded would dwarf the price of gold. Nobody has enough of it; we can’t make more of it; and whether squandered or spent wisely, once gone, it’s gone forever. To find gold we have to spend time.
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• Fraser Institute Survey Results Rank Best (and Worst) Mining Locales
• Synclinal Oil
• Small-Scale Prospecting & Mining (A Little History)
• Higher Zinc Price Creates Opportunity
• Government Appeals Miner Injury Case to Supreme Court
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