Keywords: Slickensides juniata.jpg Slickensides on a sample of sandstone of the Juniata Formation from an outcrop on Rt 322 northeast of State College Pennsylvania 2009-12-30 Own <br />Transferred from http //en wikipedia org en wikipedia Jstuby at http //en wikipedia org en wikipedia en wikipedia Jstuby Original upload log page en wikipedia Slickensides_juniata jpg 2009-12-30 20 57 Jstuby 848×443 113222 bytes <nowiki>Slickensides on a sample of sandstone of the Juniata Formation from an outcrop on Rt 322 northeast of State College Pennsylvania</nowiki> Ordovician Sandstone Slickensides Geologic formations of North America Geology of Pennsylvania |