An Outline of the Environmental Chronology of the Little Colorado Drainage Basin, Arizona
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资源简介：
Paper presented at the annual meetings of the Society for American Archeology, 1961. Discusses pollen sequence changes and environmental shifts evidenced by samples from ten sites and modern surface controls. Pollen record suggests irrigation in the Little Colorado River Basin 1275-1300 A.D.
创建时间：
2011-05-03
