Archaic Copper

//Archaic Copper

Archaic Copper

The native inhabitants of Michigan, Wisconsin and Illinois made use of float copper from Lake Gitche Gumee (Lake Superior) as far as back as 6500 BC. The copper was pure and used for personal adornment as well as simple tools and trading. Microstructural examinations revealed the artifacts were annealed as well as hot forged. Who knew the local metal working and heat treating industry was 8500 years old?

2017-11-21T10:25:42+00:00 Metal Testing|