A University of Arizona study found that before A.D. 1020, most of the wood used at Chaco Canyon came from the Zuni Mountains, which are located about 50 miles (80 km) to the south, while after A.D. 1060 much of the wood came from the Chuska Mountains about 50 miles to the west. The amount of wood imported to Chaco Canyon from these areas was immense. "The casual observer will see hundreds and hundreds and hundreds of beams sticking out of the walls. There's wood all over the place in these structures," said lead author Christopher Guiterman, a doctoral candidate at the University of Arizona, in a press release.
