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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...
Looking Back
September 2002
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.
Melman on Gold & Silver
September 2016
The most impressive fact about gold’s performance during 2016 is the yellow metal’s ability to withstand news shocks, hold on to previous gains and gradually move to new, higher levels.
The most impressive fact about gold’s performance during 2016 is the yellow metal’s ability to withstand news shocks, hold on to previous gains and gradually move to new, higher levels.
Greenstone Belts in Minnesota
August 2005
Greenstone is a dark greenish-black basaltic rock which, along with chloritized schist, forms belts up to 50 miles wide in northern Minnesota, in rocks of Late Archean age. Most belts are 2.6 to 2.9 billion years old.
Greenstone is a dark greenish-black basaltic rock which, along with chloritized schist, forms belts up to 50 miles wide in northern Minnesota, in rocks of Late Archean age. Most belts are 2.6 to 2.9 billion years old.
Ask the Experts
April 2014
Relationship between limestone and gold
Relationship between limestone and gold
Gold and Rare Earth Elements in New Mexico
August 2015
We import nearly all of our REEs from China, so it’s critical that we find and continue to develop domestic resources of these elements.
We import nearly all of our REEs from China, so it’s critical that we find and continue to develop domestic resources of these elements.
Ask The Experts
January 2016
Gold nuggets and serpentine contacts
Gold nuggets and serpentine contacts
Wyoming Expects Profits from Uranium
November 2006
Growth in worldwide demand for uranium is leading producers back to Wyoming, which leads the nation in uranium production.
Growth in worldwide demand for uranium is leading producers back to Wyoming, which leads the nation in uranium production.
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