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Madsen, grinding holes .jpg
At (left), Stephen  Ross, an archaeologist for the Arizona State Land Department and John Madsen, (right), associate curator for the Arizona State Museum (621-4795) shows a spot vandals have dug up a large volcanic rock bearing rock art and removed it from the prehistoric site. Later he took us to a historic site to show how a bulldozer from the La Oso Ranch earthmoving went off course and crossed onto BLM land and cut across a historical archaeological site...