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

Smithsonian researchers trekked to a remote site in northern Canada to collect four-billion-year-old rock samples that could ...

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

The scientists dated the rocks using zircon, a mineral in gneiss, the GSA said. "Dating zircon grains using ... techniques is now celebrated as the optimal method for determining when igneous ...

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