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The Chaco Phenomenon was an instance of such a rapid jump in culture. There is a magnificent canyon located in north-central New Mexico where this phenomenon occurred and the activity of the Anasazi reached a peak. Named Chaco Canyon, this area had a good river and was at the center of the eastern side of the Anasazi homeland. The Chaco Phenomenon, Anasazi – Ancestral Puebloan History. The Anasazi had many high and low points in their history. Generally, they developed ever higher technology and knowledge and when good rains allowed good farming, they improved and expanded their culture. At about 900 AD good times culminated in an explosion of activity. Containing the most sweeping collection of ancient ruins north of Mexico, the park preserves one of the most important pre-Columbian cultural and historical areas in the United States. Between AD 900 and 1150, Chaco Canyon was a major center of culture for the Ancestral Puebloans. Its sphere of influence was extensive. Dozens of great houses in Chaco Canyon were connected by roads to more than 150 great houses throughout the region. It is thought that the great houses were not traditional farming villages occupied by large populations. For all the wild beauty of Chaco Canyon's high-desert landscape, its long winters, short growing seasons, and marginal rainfall create an unlikely place for a major center of ancestral Puebloan culture to take root and flourish. Yet this valley was the center of a thriving culture a thousand years ago.
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