Tom Fitz

Penokee Hills Mining Controversy
12:38 pm
Tue October 8, 2013

Penokee Asbestos Worries Grow

Grunerite is found in various parts of Northern Wisconsin and Michigan's Upper Peninsula. The above sample was photographed at the Michigamme Mine in Marquette County.
Credit Leon Hupperichs

Asbestos found in rock near a proposed iron mine is raising questions about mine safety, especially for workers.  

A Northland College professor says he found a mineral called grunerite sandwiched between layers of iron ore. 

Geoscience Professor Tom Fitz says grunerite does not always take the form of the long slender fibers that characterize asbestos.  But he says in this case, it does. 

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