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Sprague River
Valley Volcano | John Seach
Oregon, USA
42.50 N, 121.50 W
summit elevation 2449 m
Shield volcanoes, maars, cinder cones,
domes
The Sprague River is located east
of the Cascade Range.
The volcano has more than 23 maars
which resulted from the interaction of magma with groundwater.
The two youngest volcanoes are Saddle
Mountain and Taylor Butte.
Volcanic Features of Sprague River
Valley Volcano
Bug Butte, Council Butte, Fuego mountain,
Calimus Butte, Saddle Mountain, Taylor Butte.
Eruptions of Sprague River Valley volcano
1.5 million years ago