Big Southern Butte

Big Southern Butte is the largest and youngest (300,000 years old) of three rhyolitic domes formed over a million years near the center of the Eastern Snake River Plain in the U.S. state of Idaho.^[5] It is one of the largest volcanic domes on Earth.^[4] It rises approximately 2500 vertical feet (762 m) above the lava plain in southern Butte County, east of Craters of the Moon National Monument.

Elevation7,550 ft (2,300 m)^[1]

Prominence2,380 ft (730 m)^[2]

Coordinates43°24′05″N 113°01′26″W^[3]

LocationButte County, Idaho,
United States

Quick facts Highest point, Elevation ...

Big Southern Butte
Big Southern Butte
Highest point
Elevation	7,550 ft (2,300 m)[1]
Prominence	2,380 ft (730 m)[2]
Coordinates	43°24′05″N 113°01′26″W[3]
Geography
Location	Butte County, Idaho, United States
Topo map	USGS Big Southern Butte
Geology
Rock age	300,000 years[4]
Mountain type	Lava dome
U.S. National Natural Landmark
Designated	1976

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Big Southern Butte consists of two coalesced lava domes with a base diameter of 6.5 kilometres (4.0 mi) and a combined volume of approximately 8 cubic kilometres (1.9 cu mi).^[6]