A weathered sign in the Minnesota River Valley proudly proclaims: “World’s Oldest Rock.” Erected in 1975, it marks a 3.8-billion-year-old gneiss — or so scientists thought.

Even if you can’t distinguish granite from gneiss, you’ll appreciate the dramatic results ... Winter crafts an entirely different landscape, with ice formations clinging to rock faces like frozen ...

Nothing tastes better than a sandwich eaten atop a rock formation that’s older than human civilization ... Even if you don’t know your schist from your gneiss, you’ll appreciate the dramatic results.

The black rock is formed of gneissBa coarse-grained ... the sedimentary rock and volcanics were forged into gneiss. The massive boulder may have been a glacial erratic transported to the South Bronx ...

NASA has found a rock on Mars that it has dubbed Skull Hill. The rock is known as a "float rock," and NASA has no idea where ...

Scientists at Nasa have discovered an out-of-place rock formation that has left researchers baffled about its origins. Dubbed “Skull Hill,” the puzzling feature was picked up by the ...

HIGHLIGHTS:Drilling at Zone 126 has intersected high-grade gold mineralisation in a position consistent with Benz's ...

It was cool,” Johnson said. Kristine Hiller, the park naturalist, said glaciers helped form the tilted rock formations in northern Minnesota. But her park doesn’t have a Minnesota name.

A trio of researchers has found evidence of the impact of the Late Antique Little Ice Age on Iceland almost 1,500 years ago.