Arizona is subject to a wide array of geologic hazards. That includes flooding, debris flows or mudslides, landslides, gradual land sinking (called subsidence) and earth fissures, swelling and ...

This undated photo provided by the U.S. Geological Survey Astrogeology Science Center shows Apollo 15 astronauts Jim Irwin, left, and Dave Scott driving a prototype of a lunar rover in a volcanic ...

Arizona is on shaky ground. The more geologists look for tremors in the Grand Canyon State, the more they find. In the past few months, the Arizona Geological Survey has recorded more than 60 small ...

A group of geology enthusiasts are rallying the public after the governor vetoed a bill that would have reopened the Arizona Mining and Mineral Museum, which has been shuttered since 2011. Senate Bill ...

PETRIFIED FOREST – Adam Marsh and Michelle Stocker had been out all day in the hot weather, breaking rocks and sifting through the pieces, when they made a major discovery last May. “What we saw under ...

The Arizona Geological Survey is making available a field guide to 21 significant geologic features at Petrified Forest National Park. The free booklet is written for park visitors who are interested ...

A view of the Stikine River near Wrangell and Petersburg. (Courtesy Cindi Lagoudakis) A geologist who has studied Southeast Alaska’s rocks and minerals for decades is creating a new geologic map of ...

FLAGSTAFF, Ariz. – Before Neil Armstrong and Buzz Aldrin knew they would be the first to walk on the moon, they took crash courses in geology at the Grand Canyon and a nearby impact crater that is the ...