USGS has unveiled its most detailed national geologic map, giving the public a free, interactive way to explore underground features. Here’s how to use it.

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 ...

Vesta, an asteroid the size of Arizona, gets its own geologic map showing its history of meteorite impact craters over its billions of years of existence. Freelance writer Amanda C. Kooser covers ...

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 ...

The U.S. Geological Survey today published the first map of the prospective locations of naturally-occurring geologic hydrogen resources in the contiguous United States, reflecting a systematic ...