On Thu, 01 Jul 2004 13:26:15 GMT, Seppo Renfors wrote:
I am aware of one piece of copper 17 ton of it (Yank ton presumably -
a short measure). It was found on the bottom of Lake Superior. I'm
also aware of another large find of several tons, but a VERY long way
underground in a modern mine. Neither kind of find was available to
the native people.

Then become aware of this from
http://www.geo.msu.edu/geo333/copper_ii.html


"A huge copper boulder on the Ontonagon River, said by Alexander Henry
(the first white man to describe it) to weigh five tons led, in 1770, to the first
copper mining venture in the UP. This first mining venture started near the
boulder that lay 20 miles from the mouth of the Ontonagon River. The
"Ontonagon Boulder" was eventually shipped to the Smithsonian Museum
and now resides by the Mall Entrance to the Museum of Natural History.
Michigan has been trying to get our Boulder back, but the negotiations are
a bit slow. You know what happens when things go to Washington. It is
about the size of a VW Bug and weighs about 5 tons. "


Other large "mass copper" pieces have been found on the surface in the UP.
One article I came across while googling said that some of the large masses
show evidence that ancient peoples had made attempts to flake pieces off of
them (tool marks).

Here's another example of "mass copper"
http://64.90.169.191/education/histo...es/copboy4.gif

And he http://www.geo.msu.edu/geo333/images/mass-copper.jpg

Gary