Greenstone Belts in Minnesota
August 2005 by Edgar B. Heylmun, PhDGreenstone 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.
President Clinton took a helicopter tour of the Grand Canyon yesterday, then put his pen to paper to designate three more areas as national monuments and expand several others.
Nearly a century after the luxury liner RMS Republic sank off Nantucket, treasure hunters are still battling over the ship’s cargo, which some believe includes gold coins now worth more than $1 billion.
Copper is one of the metals that form the backbone of our modern civilization. Copper is an essential part of every computer, cell phone, automobile and household appliance.
In March of 2001, I saw a 3” dredge for sale on the Internet that was way over priced. It was advertised as a “complete Keene 3 inch gold dredge ready to go.” But what I saw was only an old 3” Keene header-style sluice box with home made...
Some scattered reports say that gold may have been washed from streams here as early as the 1840s, but the undisputed major discovery came in 1870.
For the first time, the Sacagawea Golden Dollar changed hands, intermingling with scuffed quarters and nickels, setting itself apart with its golden hue.
Ceremonies for the induction of five mining industry pioneers into the National Mining Hall of Fame will be held Saturday, September 17, 2005 at the Museum Convention Center in Leadville.
The Bawl Mill • Our Readers Say • The Paradox Basin—Part II • A Sleeping Giant • Buying a Used Gold Dredge • Looking Back • Gold in Vermont • Picks & Pans: Prospecting on Perry Creek • 9th Circuit Court Hears Pilgrim Family Case • The First Mine in America • National Mining Hall of Fame to Induct Five • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices