Cosmic clocks help to keep time in Yellowstone
Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Mark Stelten, research geologist with the U.S. Geological Survey and deputy Scientist-in-Charge of the Yellowstone Volcano Observatory. When thinking about a place like Yellowstone, with its astounding geologic features and unique wildlife, one cannot help but wonder how the landscape came to be and what is in store for the future. For example, when did Yellowstone caldera form? When was the most recent volcanic eruption? When was the last time Yellowstone was covered by glaciers? To answer these