By GEORGE JOHNSON
<!--NYT_INLINE_IMAGE_POSITION1 --> CASAS GRANDES, Mexico — From the sky, the Mound of the Cross at Paquimé, a 14th-century ruin in the Mexican state of Chihuahua, looks like a compass rose — the roundish emblem indicating the cardinal directions on a map.
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Published on July 02, 2009 07:24