Henry's Fork Caldera

USA / Idaho / Island Park /
 volcano, region, caldera
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1.3 million year old caldera which spewed out 280 cubic km (67 cubic miles) of magma (Mesa Falls Tuff) in a single giant eruption. Note the easily visible western rim.
It lies entirely within the western part of the much larger Island Park Caldera.
Nearby cities:
Coordinates:   44°17'37"N   111°24'0"W
This article was last modified 15 years ago