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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.Melman on Gold & Silver
The Province of British Columbia, one of mining’s most active venues, has just issued a clear warning call to all miners that regulatory changes are on the way, and they may not be welcome ones…
Steven's Trail and the North Fork of the American
What were we doing going down a 4.5 mile trail to a cold river where there was no guarantee of anything except some ice and maybe cold hands and feet? First it seemed our winter was going to be a drought, and then all that reversed.
The Treasure Detective—Part IV The Story of Goldstone Nuggets
A treasure detective, like any detective, is looking for a clue from which he can develop information to solve a mystery. Who? Why? When? The detective sniffs out a trail that will lead eventually to some undiscovered cache of coins...
Working the Belmont Mine—1953 (Part 3—Conclusion)
Tuesday morning started off much like Monday except Jack wasn’t packing a bunch of drill bits. We wandered off toward the bottom of the raise, adjusted our bed boards, had a cup of coffee from our buckets, and smoked a cigarette. Then Jack stretched, stood up, and remarked, “Guess I might as well go up and see what it looks like. You wait here for now. When I call down, send up a section of ladder and eight laggings.”
Ask The Experts: How to remove precious metals from lead?
I have a large amount of precious metals, gold and silver, mixed in with lead. Cupelling is expensive. What method can I use to extract the gold and silver without cupelling?
Drywashing for Eluvial Gold in the Desert—Using a Portable Drywasher and Hand Tools
Often the gold being recovered by drywashing is too fine to be recovered by metal detecting. For every “detectable” nugget found, there could be hundreds of smaller flakes of non-detectable size. Thus, for those that “read the ground,” and snipe for areas of favorable placer concentration, drywashing will continue to be both an inexpensive...
Designing and Evaluating Placer Gold Recovery Plants
For this article, I am focusing on industrial production plants that can handle 10 cubic yards per hour or more and would be fed by a loader or other heavy equipment...
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