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MOHAVE VALLEY, Ariz. (AP) Hidden away in Christmas Tree Pass near the Arizona-Nevada border, more than 700 petroglyphs can be found at Grapevine Canyon. The petroglyphs, which were carved into the canyon rocks sometime between 1100 and 1900 AD, are a reminder that the history of the Colorado River extends long before Davis Dam made its mark on the landscape.
MOHAVE VALLEY, Ariz. Hidden away in Christmas Tree Pass near the Arizona-Nevada border, more than 700 petroglyphs can be found at Grapevine Canyon. The pe.