For decades, the oldest rock in the United States was considered Morton Gneiss, although a new contender has recently been ...

Sixty-five miles southwest of Chicago, a small hill that looks like a prop from an Indiana Jones movie breaks up the flat, ...

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

The oldest rock in the United States has been discovered in Michigan, with zircons dating back 3.82 billion years.