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sweetpepperjam

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sweetpepperjam

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Wednesday, 07/20/2011 10:06:38 AM

Wednesday, July 20, 2011 10:06:38 AM

Post# of 4973
Copper open pit mining...

Even before they start to mine it, the scientists know the value of the rock/minerals below the surface.. (Drilling, core samples)

http://library.thinkquest.org/05aug/00461/open.htm

http://library.thinkquest.org/05aug/00461/copper.htm

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