This photo shows the exposure of the Mount Jackson Rhyolite Series vitrophyre at Gibbon River. Boulders of weathered, lichen-covered rock show how easy it is to overlook these new units. (Photo by Liv ...

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from James Mauch, geologist with the ...

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Pat Shanks and Lisa Morgan, ...

Park officials tracked earthquakes, volcanic activity, and one statistic no one plans for: the hats visitors leave behind.

Back in the 1960s and 70s, a group of United States Geological Survey mappers set out to determine what rocks made up the Yellowstone Volcanic Field. Identifying the rocks that make up a region is not ...

Most tourists who visit Yellowstone National Park snap photos of Old Faithful and stroll past bubbling mud pots, never realizing they're walking on top of one of Earth's most powerful geological ...

The breathtaking beauty of Yellowstone National Park and its stunning hydrothermal features may have you exclaim: "Hold on to your hats!" The U.S. Geological Survey asks you to take that literally.

New research in Yellowstone National Park has found a connection between earthquake swarms and the chemical reactions needed to sustain ...

Maps about Yellowstone tend to grab attention fast, so most people skim them and move on, which means the real story often ...