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

Learn more about the new hydrothermal feature that appeared last summer in Yellowstone National Park, and how, even though it ...

Tourists and officials were startled by a hydrothermal explosion at Black Diamond Pool in July 2024. Geoscientists are ...

The formation of Heart Mountain near Cody is a story of a block of rock the size of Rhode Island moving at 700 mph, an ...

NASA is keeping an eye on Yellowstone, but not for the reason you might think. While most people worry about the supervolcano erupting, NASA is more interested in its extreme environment. The hot ...

In the vicinity of major geyser basins, especially on the Firehole and Madison Rivers, arsenic levels far exceed the MCL (orange and purple areas on map). (Map courtesy of the Yellowstone Caldera ...

Scientists sample water from the Firehole River in Yellowstone National Park. The work was done under National Park Service research permit 5194. (Courtesy of the Yellowstone Caldera Chronicles ...

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Blaine McCleskey, research ...

Yellowstone’s magma chamber is mostly made of a light-colored rock called rhyolite. It spreads out over an area roughly 55 miles long and 30 miles wide and reaches down to a depth of about 10 miles.

Editor's note: Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Blaine McCleskey, ...