Ashton, Idaho.
Volcanic Calderas Some 2,000,000 years ago, massive eruptions of hot rock boiled for 60 miles from this high rim on across Yellowstone Park. An exceptionally large crater remained when that lava surface collapsed. Another . . .
(Natural Features) Includes complete text, location, directions, 2 photos, GPS coordinates, map.
Volcanic Calderas Some 2,000,000 years ago, massive eruptions of hot rock boiled for 60 miles from this high rim on across Yellowstone Park. An exceptionally large crater remained when that lava surface collapsed. Another . . .
(Natural Features) Includes complete text, location, directions, 2 photos, GPS coordinates, map.