Word: anasazi
(lookup in dictionary)
(lookup stats)
Dates: during 1990-1999
Sort By: most recent first
(reverse)
...midden study covering 11,000 years of vegetation change in New Mexico's Chaco Canyon, Julio Betancourt of the U.S. Geological Survey and Thomas Van Devender of the Arizona-Sonora Desert Museum found evidence that could explain why a once thriving Anasazi Indian community was abandoned 800 years ago. Simply stated, the Indians eventually used all the surrounding pine trees for their dwellings and firewood, depleting the woodland and eroding the farmland vital to the tribe's survival...