All Articles
Synclinal Oil
April 2005 by Edgar B. Heylmun, PhD
Most oilfields are found in anticlinal faults, or stratigraphic traps. Oil floats on water, so that it will rise to the highest point possible, above the water. If the porous or fractured sandstone or limestone that contains the oil is overlain by impervious shale, the oil can no longer rise. If the porous bed is arched upward...$50 Million in Gold From 1857 Shipwreck Approved for Sale
The gold is all for sale. Just one tiny coin alone could go for $1 million because of its combination of rarity and the history behind it...
Drilling for Ore
In the simplest sense, drills can be divided by their mode of action—percussion, rotary or a mixture of the two.
Finding Gold with a VLF Detector—Part III
The higher the sensitivity setting, the louder and sharper the signal from a gold nugget or other metal target.
Gold Detecting—Are You Up For It?
“What does it take to get into gold detecting?” This may seem like a simple question, but the more I hear it, the more I realize it is a frequent question that needs to be answered.
Ask The Experts: Equipment to break up heavy clay
Q: I am looking for a “trommel machine” that doesn’t separate anything but clay slurry from rock hard clay.
Oil Seeps in Northern California
Indians used asphalt from oil seeps in California for caulking boats and other objects long before the white man arrived. Spaniards noted seeps as early as 1542, and the Portola expedition in 1769 used oil for wagon axles and as a fuel. Spaniards also used crude stills for obtaining lamp oil for use in the missions.
Guest Editorial—California "Special" Dredge Permits in Jeopardy
by Dennis J. RaffExecutive Director,
Horseshoe Bar Action & Research (HBAR)
Subscription Required:
The Bawl Mill
• Our Readers Say
• Progress Report on Washington State Small-Scale Regulations
• Pediments
• Bill to Allow Mining of Coeur d'Alene Basin
• Dredging Below the Homestake
• Looking Back
• Picks & Pans: The Glory Hole
• Enthusiastic Crowds at PDAC
• Fraser Institute Survey Results Rank Best (and Worst) Mining Locales
• Small-Scale Prospecting & Mining (A Little History)
• Higher Zinc Price Creates Opportunity
• Government Appeals Miner Injury Case to Supreme Court
• Mining Stock Quotes and Mineral & Metal Prices
• Melman on Gold & Silver
