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Geology
Break in dune dam may have forced Chaco Canyon Anasazi to new lifestyle
June 2nd, 2003
The Anasazi at Chaco Canyon who built extraordinary great houses, elaborate water-control systems, and a vast road network possibly did so because their farmlands degraded suddenly and dramatically less than a hundred years after they migrated into the area, according to a University of Arizona adjunct professor of geosciences. When Anasazi from southwestern Colorado moved into Chaco Canyon in the San Juan Basin of northwestern New Mexico around A.D. 850, they found a choice spot for farming, said Eric R. Force. "Our new data permit us to visualize what Chacoans first saw when they arrived," Force said. An "eolian" dam, a natural...
Source: Science Letter (2003-06-02)
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