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

The Grand Prismatic Spring, the largest in the United States and third largest in the world, and it's colored bacteria and microbial mats in Yellowstone National Park, Wyoming, June 22, 2011 ...

The red arrows pointing up represent uplift of the Yellowstone caldera, or volcanic crater, ... View from Above Yellowstone (IMAGE) University of Utah. Caption.