The petroglyphs featured in these slides were located on the ceiling of sandstone rock shelter called the Keyhole site. The petroglyphs have now spalled off and the site has collapsed. The glyphs created here were three anthropomorphic (human-like) and a buffalo. It is not known how old the petroglyphs are or who created them. The images were created by incising, scratching, pecking, or abrading the rock face.