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Mineralized Calderas in Colorado
May 2002 by Edgar B. Heylmun, PhD
A caldera is a large circular volcanic depression caused by collapse due to the removal of molten magma from an underlying magma chamber. The removal of magma is due to explosive venting of lava and pyroclastic material.
Tales of California Gold Discoveries 2nd in a Series—The Jenny Lind Mine
It is said that the richest deposits of gold at Foresthill were discovered by one of those accidents that is impossible for man to foresee, but which all are willing to take advantage of.
Mineral Deposit Trends: Real and Imaginary
One of the most important things prospectors do is work to figure out where to go prospecting. Along with understanding the basic geology and putting yourself in a favorable area, one of the things a prospector might consider in finding a location to search is the existence of mining belts also known as mineral deposit trends.
How to Recognize Hard Rock Gold Ores
I regularly get inquiries along the line of: “Hey, I found this rock, and I think it might be gold ore. How can I tell?” Prospectors are always on the lookout for gold-bearing rocks that may be the source of any nearby placer gold.
Surging Gold Prices Burn a Few Unlucky Mining Firms
The extraordinary rebound in gold prices is claiming some unlikely victims—a few of the gold mining companies themselves.
Growing Pains of the Learning Curve
Interestingly enough, when I first started to think about writing this article I was listening in on a conversation my wife was having with our nine-year-old twin boys. Just to add some clarification to the subject, I spend a large proportion of my time out in the...
The Bawl Mill
May 2023Can A Koozie Keep A Can Cold?
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