Blackfoot in Bingham County, Idaho — The American West (Mountains)
After a hot flow of molten rhyolite (acidic rock) boiled up through older lava, a second rhyolite dome pushed up a block of earlier basalt on its northwest side. They took many thousands of years to reach their present shape, but geologically they are very recent structures.
Erected by Idaho Historical Society & Idaho Transportation Department. (Marker Number 436.)
Marker series. This marker is included in the Idaho State Historical Society marker series.
Location. 43° 31.694′ N, 112° 42.84′ W. Marker is in Blackfoot, Idaho, in Bingham County. Marker is at the intersection of U.S. 20 and Twin Buttes Road, on the right when traveling east on U.S. 20. Touch for map. Marker is in this post office area: Blackfoot ID 83221, United States of America.
Other nearby markers. At least 1 other marker is within walking distance of this marker. Three Buttes (a few steps from this marker).
Also see . . . Big Southern Butte on Wikipedia. (Submitted on May 29, 2017, by Michael Herrick of Southbury, Connecticut.)
Categories. • Natural Features •
Credits. This page was last revised on June 3, 2017. This page originally submitted on May 29, 2017, by Michael Herrick of Southbury, Connecticut. This page has been viewed 94 times since then. Photos: 1, 2, 3. submitted on May 29, 2017, by Michael Herrick of Southbury, Connecticut.