Image: Concretions Bear Valley
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Description: Concretions of the Llewellyn Formation in the south wall of the Bear Valley Strip Mine, located west of Shamokin in Northumberland County, Pennsylvania. Sept. 1998. Rock hammer for scale.
Title: Concretions Bear Valley
Credit: Own work Transferred from en.wikipedia
Author: Jstuby at en.wikipedia
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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