Cocoraque Butte (Site Name Keyword)
1-1 (1 Record)
MEASURING THE PROPERTIES OF ROCK VARNISH ON PETROGLYPHS: A COMPARISON OF THREE METHODS OF ANALYSIS USED ON DATED GRAFFITI AND ANCIENT PETROGLYPHS AT THREE SITES IN ARIZONA
PROJECT
Archaeologists, as well as petroglyph and pictograph researchers more specifically, have striven for years to develop scientific means for dating petroglyphs, through both direct and indirect methods. For years, the conventional wisdom has been that the older a petroglyph is, the darker it will appear because of the constant process of varnish formation that occurs on rocks in arid environments. This study focused on analyzing varnish formation on both dated inscriptions and undated precolumbian...