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Oil Seeps in Northern California
July 2001 by Edgar B. Heylmun, PhD
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.Countries Want More Concessions From Miners
Bulgaria has followed the recent moves of Mongolia and Venezuela, demanding renegotiation of existing agreements and more concessions from mining companies.
Shaker Tables for Processing Hard Rock Ores
Most placer equipment is really made with gold in the 30 and larger mesh sizes in mind, though if carefully used can often get reasonable recovery down to the 50 mesh size.
Ask the Experts
Gold out of auqa regia
Eolian Gold Deposits
Prospectors who specialize in electronic detecting for nuggets in desert areas are especially interested in this type of deposit, as it yields nuggets that are close to the surface of the ground...
Uncovering the Find of a Lifetime
• The 75-ounce Butte County nugget is the largest found in California since the 156-ounce Mojave nugget in the 1970s...
Colorado Disputes Key Part of EPA Mine Report
King’s letter is a blow to the EPA’s contention that outside technical experts supported its plan to push a drainage pipe through debris covering the entrance to the Gold King Mine…
Guinea Africa: Gold, Ebola, and a Monkey Barbecue
With great relief, the equipment I chose worked well, and after shoving into three days what should have been ten days of set-up and testing, we were up and running.
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