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(Science News)   Americans began contributing to environmental pollution as early as 8,000 years ago, scientists say   ( divider line
    More: Weird, Environmental Science & Technology, pollution, Copper Falls Lake, Americans, organic matter, ecology  
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988 clicks; posted to Geek » on 21 Jun 2013 at 11:05 AM (4 years ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»

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2013-06-21 04:04:23 PM  
1 vote:
Oh, and there is a 3,708 chunk of Michigan native copper owned by the Smithsonian that hopefully goes on display soon.
2013-06-21 03:59:56 PM  
1 vote:

vudukungfu: So the native here had their own metal ages, perhaps prior to the Euros.
Big whoop.
Ow. I didn't mean whoop.
I take it back.

Some of the copper in the Keweenaw was in form known as float or mass copper, and it was damn near pure copper.  It was relatively easy to mine and process by the natives.

Now, in the later large scale mines of the late 1800's, they didn't like the larger bits of mass copper they would find.  It gummed up bits, was harder to carve up than the ore bearing rock, didn't really get bothered by dynamite and generally made a mess of things, even if it was easier to refine once it was out of the ground.
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