Looking northwest to Fumarole Butte, a 900,000 year old
shield volcano in west-central Utah. A volcanic neck marks the vent of
the volcano at the summit of the shield. Snow-capped peaks of the
Wasatch Mountains in distant background.
Looking northwest to Fumarole Butte, a 900,000 year old
shield volcano in west-central Utah. A volcanic neck marks the vent of
the volcano at the summit of the shield. Snow-capped peaks of the
Wasatch Mountains in distant background.
The volcanic neck of Fumarole Butte rises 100 feet (30
m) above the shield volcano.
Fumarole Butte (39.5N, 112.8W) is a basaltic andesite shield volcano. It is named for a volcanic neck at the center of the volcano that rises about 100 feet (30 m) above the gentle slope of the shield. The volcano formed about 900,000 years ago. Photos by Steve Mattox.
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