All Articles
Greenstone Belts in Minnesota
August 2005 by Edgar B. Heylmun, PhD
Greenstone is a dark greenish-black basaltic rock which, along with chloritized schist, forms belts up to 50 miles wide in northern Minnesota, in rocks of Late Archean age. Most belts are 2.6 to 2.9 billion years old.Additional articles that might interest you...
MMAC Update
February 2017
One caller wondered why he should be required to join MMAC, asked why MMAC was not a non-profit, and compared it to some kind of extortion attempt. If he had questions like these, I assume there are others with similar questions and I will address them here.
One caller wondered why he should be required to join MMAC, asked why MMAC was not a non-profit, and compared it to some kind of extortion attempt. If he had questions like these, I assume there are others with similar questions and I will address them here.
There’s Still Gold In Oregon’s Umpqua River
January 2008
The Umpqua River, located in the heart of western Oregon, flows for several miles nearly alongside Interstate Highway Five.
The Umpqua River, located in the heart of western Oregon, flows for several miles nearly alongside Interstate Highway Five.
Mining Stock Quotes and Mineral & Metal Prices
December 2011
Finding Gold with a VLF Detector—Part I
April 2014
The very first thing to find out...is if the detector has the ability to be ground balanced.
The very first thing to find out...is if the detector has the ability to be ground balanced.
Mining Stock Quotes and Mineral & Metal Prices
November 1999
Ask The Experts
April 2015
• Two questions: Is fool's gold magnetic? And how do you go about filing a miing claim?
• Two questions: Is fool's gold magnetic? And how do you go about filing a miing claim?
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The Bawl Mill
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• 9th Circuit Court Hears Pilgrim Family Case
• The First Mine in America
• National Mining Hall of Fame to Induct Five
• Melman on Gold & Silver
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