North Menan Butte - Idaho
Posted by: Volcanoguy
N 43° 47.137 W 111° 59.396
12T E 420347 N 4848538
Menan Buttes are located about 20 miles north of Idaho Falls and 10 miles west southwest of Rexburg, Idaho.
Waymark Code: WMEKV5
Location: Idaho, United States
Date Posted: 06/10/2012
Views: 4
North and South Menan Buttes and four smaller cones are aligned in a north-northwest direction. The buttes rise about 800 feet above the surrounding Snake River Plain and are about 10,000 years old. The buttes are the result of basaltic magma coming in contact with abundant groundwater. Particles of basaltic glass were formed as the water explosively turned to steam and fragmented the hot magma. The resulting tuff cones are made up of layered deposits of lapilli-size particles of glass and lithic rock fragments. More information at (
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North Menan Butte is managed by the B.L.M. and 2865 acres were designated as a U.S. National Natural Landmark in 1980. (
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