Ringing Rocks (zvonící kameny) je jev, kdy kameny mají tu zvláštnost, že při poklepání, např. kladivem, zvoní jako zvon.
Jedním místem s takovými kameny je Ringing Rocks Park nedaleko obce Bridgeton, Bucks County, Pennsylvania. Zvonící kameny jsou také použity do hudebního nástroje zvaným „lithophone“.
Ringing Rocks Park jsme navštívili 14.7.2006.
Ringing Rocks Park
According to the unmuseum, "In 1965 a geologist named Richard Faas from Lafayette College in nearby Easton, Pennsylvania, took a few of the rocks back to his lab for testing. He found that when the rocks were struck they created a series of tones at frequencies lower than the human ear can hear. Only because the tones interact with each other is a sound high pitched enough to be audible generated. Though Faas's experiments with the rocks explained the nature of the tones he was unable to figure out the specific physical mechanism in the rock that made them, though scientists suspect it has something to do with stress within the rocks."
Bell Rock Range
The Bell Rock Range is a large ultramafic gabbro-peridotite intrusion in the Musgrave Block of Western Australia, near Warburton. It is composed of massive, heavily indurated intrusive rocks and forms a prominent 15 kilometre long range of mountains and hills.
The intrusion is called the Bell Rock Range because, when struck, the rocks ring like a bell.
Pensylvánie
- Pittsburgh
- Ringing rocks
