Magazine - Menu - Browse Issues Articles - All Articles - Blast From The Past Articles - Prospecting & Detecting Articles - Small Mining Operations Articles - Legislation & Regulation Articles - How To Articles - Money & Markets Articles - Large Scale Mining Articles - History & Geology Articles - Ask The Experts Articles - The Bawl Mill Articles - Mining Summit Articles - PLP and Mining Districts Articles - Gold Prospecting: For Better or Worse Subscribe & Renew Find A Newsstand About Us About Us - Our Writer Edgar B. Heylmun, PhD Senior Writer (retired) Read Articles by Edgar B. Heylmun, PhD Subscription - August 1999 (Vol. 68, No. 12) PGMs in the United States Subscription - March 1999 (Vol. 68, No. 7) The Federal Land Survey System Subscription - March 1999 (Vol. 68, No. 7) Gold in Moffat County, Colorado Subscription - April 1999 (Vol. 68, No. 8) Dry Placers in the Kamma Mountains, Nevada Subscription - April 1999 (Vol. 68, No. 8) Gold at Ragged Top, Arizona Subscription - May 1999 (Vol. 68, No. 9) Gold at Mercury Mines Subscription - May 1999 (Vol. 68, No. 9) Oil and Gas in Washington Subscription - June 1999 (Vol. 68, No. 10) Gold in Mono County, California Subscription - June 1999 (Vol. 68, No. 10) Gold at Quartzville, Oregon Subscription - July 1999 (Vol. 68, No. 11) Gold Near Boulder, Colorado Subscription - July 1999 (Vol. 68, No. 11) Tantalum Subscription - July 1999 (Vol. 68, No. 11) California Diamonds Subscription - August 1999 (Vol. 68, No. 12) Guanajuato Silver, Mexico Subscription - September 1999 (Vol. 69, No. 1) The Klamath Mountains Subscription - September 1999 (Vol. 69, No. 1) Gold in the Drum Mountains Subscription - October 1999 (Vol. 69, No. 2) Picks & Pans: Prospecting for Lode Gold Subscription - October 1999 (Vol. 69, No. 2) Dry Lakes in Nevada Subscription - November 1999 (Vol. 69, No. 3) Catastrophism vs. Uniformitarianism Subscription - November 1999 (Vol. 69, No. 3) Cerro Colorado Silver, Arizona Subscription - December 1999 (Vol. 69, No. 4) Prospecting With a Magnetometer Subscription - December 1999 (Vol. 69, No. 4) Gold in Sonora Subscription - January 2000 (Vol. 69, No. 5) Mohave Mountain Placers, Arizona Subscription - January 2000 (Vol. 69, No. 5) Placer PGMs in Alaska Subscription - February 2000 (Vol. 69, No. 6) Gold in Jasperoid Subscription - February 2000 (Vol. 69, No. 6) Little Rocky Mountains, Montana Subscription - March 2000 (Vol. 69, No. 7) Sunnyside, Arizona Subscription - March 2000 (Vol. 69, No. 7) Delamar District, Nevada Subscription - April 2000 (Vol. 69, No. 8) Gold in Washington Subscription - May 2000 (Vol. 69, No. 9) Serpentine in California Subscription - May 2000 (Vol. 69, No. 9) Gold at Dale, California Subscription - June 2000 (Vol. 69, No. 10) The Gold Belts of Georgia Subscription - June 2000 (Vol. 69, No. 10) Gondwana Gold Gravels Subscription - July 2000 (Vol. 69, No. 11) The History of Tombstone Subscription - July 2000 (Vol. 69, No. 11) The Colorado Mineral Belt Subscription - August 2000 (Vol. 69, No. 12) Quartzsite, Arizona Subscription - August 2000 (Vol. 69, No. 12) Cuba Revisited Subscription - October 2000 (Vol. 70, No. 2) Massive Sulfide Deposits in Oregon Subscription - September 2000 (Vol. 70, No. 1) Jackson Hole Gold, Wyoming Subscription - September 2000 (Vol. 70, No. 1) Lightning Creek, British Columbia Subscription - November 2000 (Vol. 70, No. 3) Enrichment of Gold Veins Subscription - November 2000 (Vol. 70, No. 3) Gold in Northern Baja California Subscription - December 2000 (Vol. 70, No. 4) Potaro District, Guyana Subscription - December 2000 (Vol. 70, No. 4) Prospecting With Color Free - January 2001 (Vol. 70, No. 5) Gold in Kansas and Oklahoma Subscription - January 2001 (Vol. 70, No. 5) Prospecting for Silver With a Geiger Counter Subscription - January 2001 (Vol. 70, No. 5) Gold in Chihuahua, Mexico Subscription - February 2001 (Vol. 70, No. 6) History of Oil in California Subscription - February 2001 (Vol. 70, No. 6) Placer Gold in Washington Subscription - February 2001 (Vol. 70, No. 6) Greaterville, Arizona Subscription - March 2001 (Vol. 70, No. 7) Placer Diamonds in Venezuela Subscription - March 2001 (Vol. 70, No. 7) Placer Gold in the Black Hills, South Dakota Subscription - April 2001 (Vol. 70, No. 8) Silver at Calico, California Subscription - May 2001 (Vol. 70, No. 9) The Golden Triangle of Sonora, Mexico Subscription - May 2001 (Vol. 70, No. 9) Discovery of the Mountain Pass REO Deposit Subscription - May 2001 (Vol. 70, No. 9) Gold in Guatemala Subscription - June 2001 (Vol. 70, No. 10) Great Basin Gold Subscription - July 2001 (Vol. 70, No. 11) Uranium Deposits Subscription - July 2001 (Vol. 70, No. 11) Oil Seeps in Northern California Subscription - August 2001 (Vol. 70, No. 12) Flat-Fault Gold Subscription - August 2001 (Vol. 70, No. 12) Gold in Michigan Subscription - September 2001 (Vol. 71, No. 1) The San Juan Mountains, Colorado Subscription - September 2001 (Vol. 71, No. 1) Gold in Virginia Subscription - October 2001 (Vol. 71, No. 2) Gold in Texas Subscription - October 2001 (Vol. 71, No. 2) Spanish Silver in Arizona Subscription - November 2001 (Vol. 71, No. 3) Placer Gold in Utah Subscription - November 2001 (Vol. 71, No. 3) Gold in Panama Subscription - December 2001 (Vol. 71, No. 4) Breccia Pipes Subscription - December 2001 (Vol. 71, No. 4) Placer Gemstones Subscription - December 2001 (Vol. 71, No. 4) Gold in Iceland? 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