All Articles
Greenstone
August 2004 by Edgar B. Heylmun, PhD
Greenstone is a hard, tough, altered igneous rock, usually dark green in color. The term “greenstone” has been loosely applied to all greenish rock, including peridotite, dunite, jade, serpentine, and even hydro thermally altered rocks in mining districts. True greenstone is...Additional articles that might interest you...
Mining Stock Quotes and Mineral & Metal Prices
October 2003
Ask the Experts
October 2014
• Where would I find a map for the Western states on high silica sand deposits?
• Where would I find a map for the Western states on high silica sand deposits?
Hidden Treasure Mine—Foresthill Divide, California
September 2008
One of the greatest and richest underground placer mines of California was the Hidden Treasure Mine of Placer County.
One of the greatest and richest underground placer mines of California was the Hidden Treasure Mine of Placer County.
Mining Stock Quotes and Mineral & Metal Prices
September 2015
Gold
January 2000
Excerpted from the U.S. Geological Survey's 1998 Annual Review by Earle B. Amey, Gold Commodity Specialist.
Excerpted from the U.S. Geological Survey's 1998 Annual Review by Earle B. Amey, Gold Commodity Specialist.
Guest Editorial—Vertical Disintegration
September 2001
Since the New Deal of the 1930s, government has grown increasingly proficient at squeezing—not extra profits—but individual freedoms from the very people they are empowered to protect. By first taking our money in the form of taxes, the government then offers to return some of it, but only if it is used for the purposes dictated by the government.
Since the New Deal of the 1930s, government has grown increasingly proficient at squeezing—not extra profits—but individual freedoms from the very people they are empowered to protect. By first taking our money in the form of taxes, the government then offers to return some of it, but only if it is used for the purposes dictated by the government.
Pot Hole Gold
January 2012
It was early in the 2008 season on the Mokelumne River near Pine Grove, California. Considering the potential for high water through the month of June, my wife Fran and I set our sights on investigating some of the pot holes in...
It was early in the 2008 season on the Mokelumne River near Pine Grove, California. Considering the potential for high water through the month of June, my wife Fran and I set our sights on investigating some of the pot holes in...
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