“The Chaco Collection contains approximately one million artifacts from over 120 sites in Chaco Canyon and the surrounding region. Because most of the artifacts were systematically collected and documented, the collections are extremely valuable for scientific studies.

The Archive documents over 100 years of excavation in Chaco Canyon, and contains approximately 300 linear feet of records, 30,000 photographs, 7,000 color slides, 600 glass lantern slides, 2,000 maps, 1,000 manuscripts, and field notes, reports, and other written records.

The objects in this exhibit represent the range of materials in the Chaco Collection. They give us insight into the remarkable achievements of the Chacoan culture, and help us connect more directly to the past. ”

http://www.nps.gov/history/museum/exhibits/chcu/overview3.html