Scientists in National Parks: Yellowstone

Scientists in National Parks: Yellowstone — page 5
At the head of this river the natives give an account that there is frequently heard a loud noise like thunder which makes the earth tremble They state that they seldom go there because their children cannot sleep and conceive it possessed of spirits who were averse that men should be near them the Original Journals of the Lewis and Clark Expedition The Yellowstone River follows the canyon formed after the Yellowstone Caldera eruption more than 640 000 years ago