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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...
Legislative and Regulatory Update
November 2018
- Some mining claim fees increase
- Oregon miners file appeal
- US Fish & Wildlife law enforcement policing powers restrained
Our Readers Say
January 2011
Suggestions for claim jumpers
Suggestions for claim jumpers
Solar Powered Placer Equipment
September 2006
Is three-dollar gas cutting into your gold prospecting? Tired of gas engine maintenance? Gas engine fumes and noise bothering you? Then go solar.
Is three-dollar gas cutting into your gold prospecting? Tired of gas engine maintenance? Gas engine fumes and noise bothering you? Then go solar.
Highbanking and the House Rock
June 2010
I hit bedrock at two feet and followed it down as it appeared that I was on the edge of a rib that ran with the river. This was beginning to look very promising and I was seeing some small gold—pieces and flakes—in the header of my sluice box.
I hit bedrock at two feet and followed it down as it appeared that I was on the edge of a rib that ran with the river. This was beginning to look very promising and I was seeing some small gold—pieces and flakes—in the header of my sluice box.
Pacific Northwest Miners Request Help
August 2001
On May 29, 2001, the Siskiyou Natl. Forest (SNF) announced that they will be preparing an Environmental Impact Statement (EIS) on the effects of suction dredging, with the hope of eventually approving Plans of Operation, as required by the 1994 Northwest Forest Plan.
On May 29, 2001, the Siskiyou Natl. Forest (SNF) announced that they will be preparing an Environmental Impact Statement (EIS) on the effects of suction dredging, with the hope of eventually approving Plans of Operation, as required by the 1994 Northwest Forest Plan.
A Few Thoughts About Successful Nugget Hunting
November 2013
...I got the faintest of rises in the threshold. It was hardly a signal at all, and I thought it was one of the many, deep, hot rocks in the area.
...I got the faintest of rises in the threshold. It was hardly a signal at all, and I thought it was one of the many, deep, hot rocks in the area.
Alaska and Nevada Continue to Lead the Pack
December 2007
Alaska’s mining industry posted a record-breaking year in 2006, largely because of the high prices for zinc and other metals, state officials said.
Alaska’s mining industry posted a record-breaking year in 2006, largely because of the high prices for zinc and other metals, state officials said.
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