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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.
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Platinum Prices Could Spur Wyoming Rush
April 2000
Rising platinum prices could lead to a rush in southeastern Wyoming, one of the few places in the world where the metal is found, a state geologist said.
Rising platinum prices could lead to a rush in southeastern Wyoming, one of the few places in the world where the metal is found, a state geologist said.
Ask The Experts
January 2016
What are these rocks?
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Ask the Experts
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• What's worth picking out of the pan besides gold?
• What's worth picking out of the pan besides gold?
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The big moment finally arrived. With Norm suited up, I pulled the motor to life and felt instantly better. There’s really something relaxing about the sound of a dredge running—they don’t sound like anything else.
The big moment finally arrived. With Norm suited up, I pulled the motor to life and felt instantly better. There’s really something relaxing about the sound of a dredge running—they don’t sound like anything else.
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Within a few minutes I got my first signal and dug out a small flake about three grains.
Within a few minutes I got my first signal and dug out a small flake about three grains.
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Doug told me that there had been a 100-year flood that took place in October of 2013 and it washed out part of the mile-long landing strip. It also washed a large, wide gully down below and above the camp.
Doug told me that there had been a 100-year flood that took place in October of 2013 and it washed out part of the mile-long landing strip. It also washed a large, wide gully down below and above the camp.
Colorado Court Rules on Cyanide Ban
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The Colorado state Court of Appeals ruled that counties have the authority to ban the use of cyanide in gold mining.
The Colorado state Court of Appeals ruled that counties have the authority to ban the use of cyanide in gold mining.
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