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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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Dawson City and the World Gold Panning Championships
November 2007
Each year the World Gold Panning Association (WGPA) holds a world championship in one of the twenty countries that are members. The decision as to where to hold each championship involves many factors...
Each year the World Gold Panning Association (WGPA) holds a world championship in one of the twenty countries that are members. The decision as to where to hold each championship involves many factors...
From Curiosity to Mine Owner - Pt II
October 2015
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When we last heard from Ernie, he was still in Honduras and we were anxiously waiting to hear how the set up and training went at the mine. It got a bit complicated after that.
When we last heard from Ernie, he was still in Honduras and we were anxiously waiting to hear how the set up and training went at the mine. It got a bit complicated after that.
Prospecting Ores Shoots and Hidden Veins for Specimen-Grade Gold Samples
June 1999
Until about 20 years ago, interest in Wyoming's gold was at an all-time low, not only because of relatively-low gold prices, but also due to the lack of information on many of the state's gold deposits.
Until about 20 years ago, interest in Wyoming's gold was at an all-time low, not only because of relatively-low gold prices, but also due to the lack of information on many of the state's gold deposits.
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November 2015
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Hidden Value in Old Tailings
March 2014
The 15 rare earth elements were discovered long after the gold rush began to wane, but demand for them only took off over the past 10 years...
The 15 rare earth elements were discovered long after the gold rush began to wane, but demand for them only took off over the past 10 years...
ICMJ 9th Annual Photo Contest Results
January 2000
See the top 10 winners!
See the top 10 winners!
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