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

What we know today as Sabino Canyon was the site of a whole lot of scrunching 25 million years ago. In a geologic nutshell: Two ancient types of rock - 1.4-billion-year-old Oracle granite and 50 ...

The rock known as Morton gneiss started out as a gray granite, formed about 3.5 billion years ago deep beneath the surface of the Earth. Molten rock cooled slowly, forming grains (granite comes ...

Wyoming geologist Carol Frost and three of her colleagues have identified a new oldest rock in America. Found in Michigan, ...

Is it the granite of Washington Pass or the ... There's a whole mountain of this stuff, the Yellow Aster gneiss. It's metamorphic. Metamorphic rocks used to be a different kind of rock originally.

Scientists have discovered that the oldest intact rock in the United States is not in Minnesota or Wyoming—but in Michigan’s Upper Peninsula. The 3.62-billion-year-old Watersmeet Gneiss is rewriting ...

With house-size boulders tumbled across its scarred surface and slanted, twisted peaks looming over its iconic namesake trees, Joshua Tree National Park’s preternatural terrain evokes ...

For years, Minnesota’s Morton Gneiss was celebrated as the world’s oldest rock, with claims dating back to 3.8 billion years. A sign near its outcrop in Granite Falls, Minnesota, proudly ...

WHEN: After a 5-day climb battling icy weather conditions, Honnold and Findlay successfully summited the granite-gneiss rock face on Tuesday, Aug. 16. WHERE: Sitting at ground zero of the climate ...