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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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Our Readers Say
January 2002
• "Thank you..."
• "...dredges under 8" need not be regulated"
• "Thank you..."
• "...dredges under 8" need not be regulated"
Mine Woes Could Mean Higher Taxes
March 1999
Hard times for the copper industry could cost property owners in Grant County.
Hard times for the copper industry could cost property owners in Grant County.
Silver at Calico, California
April 2001
Silver was discovered in the mountains as early as 1875, but the first “official” discovery was in 1881.
Silver was discovered in the mountains as early as 1875, but the first “official” discovery was in 1881.
Freegold Mountain Project
September 2012
Few areas of the world have a mining history comparable to Canada’s Yukon Territory thanks to the fabled Klondike Gold Rush, which took place from the late 1890s into the early years of the Twentieth Century. Tens of thousands of prospectors and treasure hunters poured into the Territory following the discovery of placer gold...
Few areas of the world have a mining history comparable to Canada’s Yukon Territory thanks to the fabled Klondike Gold Rush, which took place from the late 1890s into the early years of the Twentieth Century. Tens of thousands of prospectors and treasure hunters poured into the Territory following the discovery of placer gold...
The Bawl Mill
September 2009
• Feeding the addiction...
• Running on empty...
• Boxer may go down with the count
• Feeding the addiction...
• Running on empty...
• Boxer may go down with the count
A Good Start
July 2011
We split up in order to cover a larger area and found good color almost everywhere. The bedrock was shallow on both sides of the river, but the inside bend was where we concentrated our prospecting.
We split up in order to cover a larger area and found good color almost everywhere. The bedrock was shallow on both sides of the river, but the inside bend was where we concentrated our prospecting.
Melman on Gold & Silver
January 2007
Putting this information together, we conclude that the coming year of 2007 could hold explosive growth for the precious metals as the probability of an international “accident” rises, as the dollar comes under increasing pressure and as the fundamental demand for resources of all types from India and China plus other developing nations grows relentlessly.
Putting this information together, we conclude that the coming year of 2007 could hold explosive growth for the precious metals as the probability of an international “accident” rises, as the dollar comes under increasing pressure and as the fundamental demand for resources of all types from India and China plus other developing nations grows relentlessly.
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The Bawl Mill
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