rhyolite stone mining
The Carbaugh Run Rhyolite Quarry Site is an archaeological site in Franklin Township, Adams County, Pennsylvania, United States.It is composed of two smaller sites: agroup of small quarries on top of Snaggy Ridge, and the remnants of what may have been a campsite along Carbaugh Run below the ridge.: 2 Since their discovery by Norman Keefer in the 1920s, the quarries have been examined ...
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