Geologists recently dated the age of Watersmeet gneiss, a type of rock in the Upper Peninsula, as the oldest in the U.S. Here ...

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

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

In a recent study, geologists say Michigan is home to the oldest known rock in the nation. Watersmeet gneiss is found in Michigan's Upper Peninsula. Minnesota's Morton gneiss previously held the ...