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Gold in Sonora
December 1999 by Edgar B. Heylmun, PhD
The state of Sonora, slightly smaller in area than Utah, lies in-northwestern Mexico, adjoining Arizona to the south. It is characterized, on the east, by a high volcanic plateau, the Sierra Madre Occidental, which forms its boundary with Chihuahua.AMRA Takes On USFS in Idaho

Legislative and Regulatory Update
• Meeting planned to address small-scale regulations
• Karuk Tribe update
• Oregon dredgers in their own fight over regulations
The Old Dutch Cleanser Mine

Our Readers Say
Hardrock Mining Accidents Claim Four Lives
Hardrock mining in the US has been hit by a tragic streak of mining accidents in recent months.
Double-D Coils and Their Place in the Goldfields

Enrichment of Mineral Deposits by Weathering—Part II

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The Bawl Mill
• Over the Divide
• Our Readers Say
• Desert Phone Trashed
• ICMJ Elected Prospecting Magazine of 1999
• Advertising Manager Leaving ICMJ
• Guest Editorial—California "Special" Dredge Permits in Jeopardy
• The Search Continues
• Guest Editorial: U.S. Government—Like Nobody's Business
• Circulation and Collections Manager Leaving ICMJ
• Company Notes
• House Chair Requests Records on Forest Decision
• BLM Wants to Withdraw South Pass Public Land
• Silverton Preserving Lofty Symbol of Mining Era
• Hijackers Make Off With 660 Pounds of Gold
• Prospecting With a Magnetometer
• 1999 Tables of Content
• Lighting the Way Underground 1860-1940s
• Millie's Tailings
• Picks & Pans: Crevicing & Sniping for Placer Gold
• Looking Back
• Forest Service Boss Quits in Bull Trout Flap
• Melman on Gold & Silver
• European Gold Miners Seek Clarification Letter
• Mining Stock Quotes and Mineral & Metal Prices
• Squeezing Diamond Into Graphite
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