Keywords: BirdwellPetroglyphSite.jpg Birdwell Rock Petroglyph Site in Fresno County California The petroglyphs are probably of Chumash origin and were said to mark one end of a geographic alignment at the winter solstice 03000117 1999 Scan from Sacred Rocks Not For Public Consumption Proceedings of the Society of California Archaeology 1999 Bruce M Crespin a US Bureau of Land Management employee other versions PD-USGov National Register of Historic Places in Fresno County California Archaeological sites on the National Register of Historic Places in California Chumash Uploaded via Campaign wsm |