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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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Prospecting for Diamonds
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Let’s take a look at diamonds and diamond mining and see how they form, how they are used beyond just jewelry, and what leads geologists to find diamond deposits.
Let’s take a look at diamonds and diamond mining and see how they form, how they are used beyond just jewelry, and what leads geologists to find diamond deposits.
The Ball Mill
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Melman on Gold & Silver
December 2004
Well, the long-anticipated US election was held the first Tuesday of November. If you were a partisan of the Republican Party, victory was sweet, indeed. If you supported Kerry and his pals, our truest sympathies, for the electoral devastation was complete. Bush won in both the Electoral College and popular vote contests...
Well, the long-anticipated US election was held the first Tuesday of November. If you were a partisan of the Republican Party, victory was sweet, indeed. If you supported Kerry and his pals, our truest sympathies, for the electoral devastation was complete. Bush won in both the Electoral College and popular vote contests...
Which Specific Gravity Test Works Best?
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Have you ever wondered how accurate specific gravity tests are in determining the amount of gold in a specimen?
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Balmoral Resources
July 2013
One of the oldest sayings in the mining exploration world is that if you are going to search for a new mine, one of the best places to look is near an existing, proven property.
One of the oldest sayings in the mining exploration world is that if you are going to search for a new mine, one of the best places to look is near an existing, proven property.
Alaska's Cripple Creek Mining District
November 2011
If developed with metal detecting in mind, this virgin ground could be a bonanza for nugget hunting.
If developed with metal detecting in mind, this virgin ground could be a bonanza for nugget hunting.
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The Bawl Mill
• Our Readers Say
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• Drywashing Rules Clarified
• The Keystone Gold-Copper District, Medicine Bow Mountains, Southeastern Wyoming
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• Looking Back
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