The rocks of a certain area of Butte, Montana give off a musical ring when hit.
Using rocks as instruments goes back a very long time. Known as "rock gongs" they were rocks which could be struck and produce a melodious resonant sound and were used in Africa. In Vietnam, they built a form of "Lithophones" or musical instrument built from rocks, and some of these instruments date back nearly 2000 years.
Near Butte, just such stones exist. Part of the edge of the Boulder Batholith, and found in a large jumbled pile of boulders, the rocks in this unique geologic formation chime melodically when tapped lightly with a crescent wrench or mallet.
It is believed that the ringing is a combination of the composition of the rock and the way the joining patterns have developed as the rocks have eroded away, though ultimately a concrete scientific explanation has yet to be arrived at. Curiously, if a boulder is removed from the pile, it no longer rings. Slightly different pitches and timbres emanate from thousands of rocks in the formation, and in theory, Butte's Ringing Rocks could form the basic ostinato for the "Music of the Spheres."(Musica Universalis)
Know Before You Go
This unique geological formation is located approximately 18 miles east of Butte and north of I-90 on BLM land just beyond the Pipestone trailhead. The rocks in this unique geologic area chime when tapped with a hammer.
Take Exit 241 (Pipestone) from I-90 and travel east on a gravel road (parallels interstate) for about three-fourths of a mile, then turn north on a gravel road, cross the railroad tracks and continue north for approximately 3 miles. A high-clearance, 4WD vehicle is essential, as the last mile is on a steep, very irregular road.
Content originally created for Atlas Obscura.