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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.
Mining Stock Quotes and Mineral & Metal Prices
House Chair Requests Records on Forest Decision
House Resources Chairman Don Young is asking the White House and Agriculture Department for records related to President Clinton's decision to place 40 million acres of remote, federal forest land off-limits for development.
The Hunch
The mysteries of this spot were only just starting to develop. There is nothing but very bland granite-type rocks here, meaning no bold, favorable indicators.
The Pothole Patch
"Suh-wheet!" I exclaimed as I sprang to my feet and quickly pumped my detector coil high overhead to alert Smokey that I had just found a nugget.
Melman on Gold & Silver
This past month certainly had its share of attention-grabbing headlines starting with the overwhelming wins by (presumed) Democratic Presidential Candidate John Kerry of Massachusetts. He effectively swept aside all opposition in a series of Democratic primary election wins from the Atlantic to the Pacific.
A New Look at Old Mines
Exploration companies are actively looking for properties with profitable potential, even if the ground was once cast off as too low in grade to be economically viable. This is especially true in states that are reasonably friendly toward...
Company Notes
• Washington Group Int'l
• Robinson Nevada Mining Co.
• Little Squaw Gold Mining Co.
• Newmont Mining Corp.
• Compania de Minas Buenaventura
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