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Carbonatites
February 2005 by Edgar B. Heylmun, PhD
Carbonatites are rocks that formed from molten calcite or dolomite. The thought of calcite being molten lava is difficult to accept, but it was confirmed when it poured out of a vent in Tanzania in 1960.How Rich Must My Ore Be?
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I get a lot of questions from prospectors about garnets, their value and what they tell us about the geology of some types of mineral deposits. So I thought it would be a good idea to take a closer look at the lowly garnet and learn a bit more about it.
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Looking Back
Excerpts from CMJ published 50 years ago this month.
Gold in Arkansas
Arkansas has an area of over 53,000 square miles, with a population of over 2.3 million. Natural vegetation consists of hardwood forests where not cleared for agriculture or urbanization.
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