April 2005 by Edgar B. Heylmun, PhDA 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.
The whole purpose of sampling mineralized ground is to measure the values in a small volume of material that would be representative of a much larger volume of similar material. The key word is representative. Chemical and fire assaying will not accurately represent placer deposits by themselves.
• Environmental groups push for more ESA listings
• Proposed grant program to recruit mining engineering students
The Wyoming State Geological Survey announced ten new geologic maps have been completed and are now available.
I didn’t follow-up on this opportunity at that time, as I already had as much on my plate as I could handle, but the potential for this property has never left my mind.
Gold mining adventures can begin in the most unusual fashion. This one started when the high water receding in May of 1999 disclosed that a tragedy had occurred somewhere upstream of Slaughterhouse Gulch on the north fork of the...
A breccia pipe, or chimney, is an irregular cylindrical mass of breccia that is often silicified and stands out as an iron-stained knob. They can be from a few feet to several hundred feet in diameter, and may or may not be mineralized.
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