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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.Clean Fuel, Cleaner Air
A-55 Clean fuels, which are emulsions of oil and water, are said to produce much lower oxides of nitrogen and particulate matter emissions.
Microbes Play Role in Gold Creation
Researchers in Australia have uncovered evidence that a tiny microbe may have the Midas touch of Greek legend, capable of turning dust to gold.
Our Readers Say
- Conversion charts and tables
- Solutions to anti-mining efforts
Original Issue Now Available as a Free Download
An original copy of our very first issue was recently found at the North Star Mining Museum in California by Carol Marshall, and the museum was nice enough to return it to us! (Read the full story.)
The issue is now available as a free pdf download. The file is approximately 7Mb.
(A black & white reprint is also available for $6.00 plus postage.)
Click here to download a copy.
Searching for Gold at Paradise Valley, Alaska
There are lots of stories about the big gold found in Alaska, but where does a prospector get the idea that it’s something the every day gold miner might get involved in? One must understand that the quest for gold in the mid-1800s brought...
Ask the Experts
Market for scheelite concentrates?
Resurrecting An Old Hard Rock Mine—Gold At Last!
We’ve been busy with a plethora of projects, all aimed at gathering gold into a pile big enough to brag about. We’re not there yet, but I’ll show you some of the interesting projects we’ve completed since we talked last.
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The Bawl Mill
• Our Readers Say
• Progress Report on Washington State Small-Scale Regulations
• Bill to Allow Mining of Coeur d'Alene Basin
• Dredging Below the Homestake
• Looking Back
• Picks & Pans: The Glory Hole
• Enthusiastic Crowds at PDAC
• 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
• Mining Stock Quotes and Mineral & Metal Prices
• Melman on Gold & Silver
