MARQUETTE, MI-- A group of volunteers is trying to save the world’s largest contiguous piece of glacial copper from being melted down.
June Rydholm is the widow of U.P. historian Fred Rydholm, who spearheaded the effort to save the 28.2-ton slab found in Calumet.
“Most of our float copper we hold in our hand, you know, they’re small pieces,” she says. “And this had broken off in the glacier as it moved many hundreds of years ago—maybe thousands of years ago.”