Paleo Slide Set: Packrat Middens: Vegetation & Climate Variability in the Southwestern United States
Piņon-juniper woodland at Mesa Verde National Monument, southwestern Colorado.

During the last glacial, these woodlands would have been displaced several hundred kilometers 
in what are now the hot deserts of southern Arizona and southern New Mexico. 

Photo Credits:
Julio L. Betancourt 
U.S. Geological Survey