Three Rivers Petroglyph Site has more than 21,000 petroglyphs of birds, humans, animals, fish, insects and plants, as well as numerous geometric and abstract designs are scattered over 50 acres of New Mexico's northern Chihuahuan Desert. The petroglyphs at Three Rivers, dating back to between about 900 and 1400 AD, were created by Jornada Mogollon people who used stone tools to remove the dark patina on the exterior of the rock. (Description courtesy of the BLM)
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