SOUTH HAVEN, MI -- Lake Michigan’s beaches are filled with colorful rocks, beach glass and intricate fossils from different eras of the lake’s 1.2 billion year history. Because of that ...

Yooperlites are a variety of sodalite-rich syenite found in the Upper Peninsula of Michigan.

We can add another Michigan discovery to the list related to the oldest rock in America! That's right, this particular rock ...

according to Michigan State University. The copper ore-rich rocks lived in rock layers deep in Lake Superior. By 1860, three major copper-producing regions had been developed in the Upper ...

In Michigan and Minnesota, these agates can be found along the shores of Lake Superior. This unique rock is a conglomerate that metamorphosed into quartzite, and got its name because it looked ...