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Digital Subscriptions > Rock&Gem Magazine > August 2019 > FIELD NOTES

FIELD NOTES

More ‘Black Smoker’ Examples

I enjoyed Bob Jones’ article in the June, 2019 issue of Rock & Gem on submarine “black smoker” hot spring deposits. Another ancient example of such a deposit was well exposed in the Flambeau Copper Mine open pit, Ladysmith, Wisconsin when it was mined from 1993 to 1997.

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Rock & Gem August 2019,