Near the south boundary of Yellowstone National Park is a curious ash flow deposit of unknown origin. Geologists from Montana State University took on the challenge of solving the mystery.
Near the south boundary of Yellowstone National Park is a curious ash flow deposit of unknown origin. Geologists from Montana State University took on the challenge of solving the mystery.
Near the south boundary of Yellowstone National Park is a curious ash flow deposit of unknown origin. Geologists from Montana State University took on the challenge of solving the mystery.