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Synclinal Oil

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...

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Diamond Dealer Prevails in Congo


The one he’s rolling around in his fingers is nice—5.23 carats, nearly the size of a marble, pure and white. But the diamond that Alphonse Ngoyi Kasanji is talking about is the big one—the one that got taken away.

Ask The Experts - What Do I Look For and How Do I Sample?


Iron Ores and Iron Mining


For more than 40 years, iron ore prices have been decided by private negotiations conducted between the largest of the iron miners and the largest steel producers. These two sides dominate both the spot and contract iron ore markets.

Gem Theft in Tucson


Police are investigating the theft of five stones, valued by their owner at $128,000, from an exhibit at a Tucson gem show.The largest of the stones taken from the show was a 7-inch-tall pink tourmaline worth $85,000.

Ask the Experts


Q: ...where would you recommend selling class rings and other scrap gold?

Chasing Float Gold—The Starry Night Wash


The sun was beginning to set, which put the light at just the right angle against the hillsides to where I believed that I spotted a very small dig and tailings pile up the hill near the top of the second wash.

Legislative and Regulatory Update


• Some positives in spending bill
• Judge puts brakes on the EPA in Alaska
• Judge to rule in favor of suction gold dredgers

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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

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Legislative and Regulatory Update

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