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U.S. Rock Art in the Twenty-first Century: Problems and Prospects

Aerial view of intaglios. These earth figures, or geoglyphs, located near Blythe, California, were created to commemorate mythic events and actors. Believed to be less than two thousand years old, they were placed at the locations of these mythic events along a ritual pilgrimage route used by Yuman-speaking tribes. Photo: David S. Whitley.