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 is a dynamic geologic system—the one constant is change. This is demonstrated daily by hydrothermal activity ...

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 NATIONAL PARK — The Wyoming State Geological Survey (WSGS) Yellowstone Geologic Geographic Information System (GIS) Database features a new interactive website about the region's geologic ...

A map showing how the ground around the Yellowstone supervolcano has deformed over the last two years has been released by the U.S. Geological Survey. The map, by USGS geophysicist Chuck Wicks, shows ...

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 ...

You probably know that Yellowstone National Park’s iconic Old Faithful, which fires geysers up to 180 feet in the air, gets its kick from underlying magma that heats and propels water. You know that ...

YELLOWSTONE NATIONAL PARK — Yellowstone National Park is a captivating place of breathtaking spectacles and geologic wonder. Most of the surface spectacles are driven by geologic processes ongoing ...

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.