William G. White is a professional archaeologist (RPA # 11783) with 30+ years of practical experience, currently employed at Lake Roosevelt National Recreation Area. Trained in historical archaeology, William specializes in late 19th and early 20th century mining with additional interests in Victorian and Depression-era culture, fur trade, western expansion, and prehistoric and historical-period rock art. He has worked in numerous western states with primary focus in the Great Basin. As time allows, William's rock art interests are in the identification of Pahranagat Representational Style sites in Lincoln County, Nevada, intent on determining spatial relationships and further understanding this geographically unique rock art style.
MA - University of Nevada, Las Vegas; 1990 Anthropology; emphasis Historical Archaeology
BA - California State University, Chico; 1977 Anthropology; minor in Native American Studies
Skepticism and the Shamanic Model in Rock Art. Nevada Archaeologist 18:42-50
A Model for Establishing Chronometric Age Determinations for Petroglyphs and Pictographs on the Nellis Air Force Range and Adjacent Overflight Lands, Clark, Lincoln, and Nye Counties, Nevada. Harry Reid Center for Environmental Studies, University of Nevada, Las Vegas. HRC Report1-8-20. (1999)
A Cultural Resource and Geological Study Pertaining to Four Selected Petroglyph/Pictograph Sites on Nellis Range and Adjacent Overflight Lands, Lincoln and Nye Counties, Nevada. HRC, UNLV. HRC Report 1-8-19. (1999).
Cast Shadows, A Lizard's Tail, and Prehistoric Time Reckoning: A Calendrical Petroglyph on the Lower Colorado River. In Recent Archaeological Work Along the Lower Colorado River. Statistical Research Technical Series, No. 50, Tucson. (1994)
Further Observations at 4-IMP-6905. In Glyphs and Quarries of the Lower Colorado River Valley. Statistical Research Technical Series, No. 44, Tucson. (1994)
Some Observations Concerning Palo Verde Point Petroglyph Site (4-IMP-6905). Bureau of Reclamation, Lower Colorado Region. BOR Report LC-CA-93-2. (1993)
Pahranagat Representational Rock Art Style. Nevada Archaeological Association. 37th Annual Conference, Minden, Nevada. (2008)
Anthropomorphic Petroglyphs of the Pahranagat Region. Society for American Archaeologists, 70th Annual Meeting, Salt Lake City, Utah. (2005)
Pahranagat Style Anthropomorphs. Mojave Rock Art Workshop. 7th Annual Conference, Sweeney Granite Mountain Desert Research Center, California. (2003)
Palo Verde Point and a Calendrical Petroglyph on the Lower Colorado River. Utah Rock Art Research Association Annual Symposium, Cedar City, Utah. (1994)
Cast Shadows and a Lizard's Tail: A Calendrical Devise on the Lower Colorado River. Nevada Archaeological Association Conference, Las Vegas, Nevada. (1994)
Jon Harman has spent over twenty years pursuing rock art as a serious hobby. He is a member of the Bay Area Rock Art Research Association (BARARA), the Society for California Archaeology and the American Rock Art Research Association (ARARA). He has traveled throughout the United States as well as to Mexico, North Africa and France in search of petroglyph and pictograph sites.
Jon earned a Bachelor of Arts in Mathematics in 1972 from the University of Wisconsin in Madison and a Ph.D. in Mathematics in 1980 from the University of California in Berkeley. With this background, he enjoyed a lengthy career in the field of medical imaging. He worked for a CT manufacturer and an ophthalmology device manufacturer, specializing in the design of algorithms used in creating medical images and in analyzing structures in the images.
A suggestion from Robert Mark in November 2004 led to Jon’s implementing the decorrelation stretch scientific algorithm in a computer program that would assist rock art researchers. Jon then combined his career and hobby to create DStretch, an image enhancement program to be used specifically with digital photographs of pictographs. It is a plug-in for Image J, which is a public domain image processing program developed at the National Institute of Health by Wayne Rasband.
See D-Stretch example images below.
DStretch was introduced to the public in March 2005 at a meeting of the Society of California Archaeology in Sacramento. It has rapidly gained widespread recognition and acceptance as an invaluable research tool. Because DStretch requires a color difference, it works significantly better on pictographs, particularly those containing faint red, yellow and/or black. It enables the user to examine a photograph of a pictograph under eight different color spaces and see elements not visible in the original image.
Pictograph panels previously dismissed as insignificant or impossible to see can now be examined in a new light. Some particularly dramatic examples are from Great Basin National Park, Nevada; Pahranagat National Wildlife Refuge, Nevada; Kachina Cave, Nevada; Buckhorn Wash, Utah; Head of Sinbad, Utah; Chumash and Yokuts pictographs in central California; and the Great Mural Paintings of Baja California.
Since the advent of DStretch, rock art researchers and enthusiasts have been returning to sites with their digital cameras and re-photographing pictographs. Their results have been both amazing and revealing.
Jon has presented papers on the use of DStretch at meetings of the Museum of Man in San Diego , the Society for California Archaeology, ARARA, the Nevada Rock Art Foundation, the Nevada Archaeological Association, the Bi National Meeting of Balances and Perspectives on the Anthropology and History of Baja California and the Sociedad Mexicana de Antropologia.
Leigh Marymor has been actively pursuing rock art interests for over 30 years. He is particularly interested in rock art site conservation and protection issues, and in the literature of rock art studies. Some of his activities in the field include:
1983 - Present Co-Chairman, Bay Area Rock Art Research Association
1993 - Present Compiler, Rock Art Studies: A Bibliographic Database, online at Bancroft Library, UC Berkeley
1995 - Editor, California Rock Art. A Site Inventory and Annotated Bibliography, Bill Sonin
2004 - 2006 President, American Rock Art Research Association
Dr. Michael W. Kuhn
Ph.D. in Geography - U. C. L. A.
Taught at San Jose State College 1966-67 and U. C., Santa Barbara 1967-1974
City of Simi Valley 1974-2003 - in charge of Environmental Planning.
Life long interest in archaeology, including recording of archaeological and rock art sites in the Mojave Desert and in the Transverse Ranges of California and elsewhere.
Periodically work for W & S Consulting on archaeological surveys and excavations since 2004.
Author of hundreds of articles and professional papers relating to geography, anthropology, ethnography, local history, and natural history.