A petroglyph is a rock engraving made by pecking the surface with a harder stone. Some
are abraded or rubbed, some are scratched or incised into the rock and some have
cross hatched textures that are chiseled across the surface.
The Sinagua were a pre-Columbian cultural group occupying an area in central Arizona between the Little Colorado River and the Salt River (between Flagstaff and Phoenix) including the Verde Valley and significant portions of the Mogollon Rim country between approximately 500 AD and 1425 AD. Some archaeologists have referred to the Sinagua as the Western Anasazi.
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