This geological map of Yellowstone National Park was based on work by William Henry Holmes in 1878 as part of Ferdinand Vandeveer Hayden’s United States Geological and Geographical Survey ...

In geology, even small layers can tell big stories. But figuring out the origins of such small layers can be a challenge, ...

The blue water spring is about 13 feet in diameter and 1 foot below the rim, USGS said. The water in the pool was measured at 109°F.

The interactive Geology of Yellowstone Map has been updated with new data. Check out recently added map layers that highlight Yellowstone’s monitoring instrumentation, hydrothermal features, ...

The explosions "have emerged as one of the most important and least understood geologic hazards in Yellowstone National Park," Morgan writes. Yellowstone is the hotbed for geologic hazards ...

With more trips planned for this fall and next summer, there is strong hope that the map will be done before the park's 150th Anniversary in 2022! ...

The explosions "have emerged as one of the most important and least understood geologic hazards in Yellowstone National Park," Morgan writes. Yellowstone is the hotbed for geologic hazards ...