A 4.2 magnitude earthquake struck near Great Falls on Thursday, briefly rattling residents and raising questions about why earthquakes occur in the region.

Yosemite National Park is defined by its overwhelming magnitude. Granite cliffs rise thousands of feet into the California sky, and waterfalls thunder with a power that vibrates in your chest. But ...

This illustrated geologic timescale of Earth focuses on the landscapes, flora and fauna of the West, drilling into the region’s deep history.

Plumas-Eureka State Park offers a hidden gem in the Sierra Nevada with Gold Rush history, stunning hikes, alpine lakes, and year-round outdoor adventures.

The Rocky Mountains have always looked like a geological non sequitur, a towering spine of peaks sitting far from the ...

The model also proved the theorized existence of the Pioneer fragment, a remnant of the ancient Farrallon plate that used to ...

Earth is covered with technofossils, or man-made materials, that will last for centuries and maybe even longer.

Landslides closed Highway 1 for three years. No one expects this will be the end of its battle with the forces of nature.

How the two primary people of the gold discovery in California failed to cash in.

Bright white rocks spotted by NASA’s Perseverance rover are rewriting what we thought we knew about ancient Mars. These ...

Rockhounders can find all kinds of gemstones across the United States, but there are certain places where geodes can be found ...

Over the last few days, the Coachella Valley has experienced more than 20 earthquakes, causing concern among some residents.