The Quaternary Alluvium comprises channel,
floodplain and terrace deposits along Beaver Creek. These
deposits are in contact with the Tertiary Verde Formation
in the southwestern portion of the watershed. The
channel and floodplain deposits consist mainly of poorly
sorted sand, gravel, silt, and clay. The terrace
deposits consist mainly of fine layers of sand, silt, clay,
Owen-Joyce, S.J. and Bell, C.K., 1983 Appraisal of Water Resources in the Upper Verde River Area, Yavapai County, Arizona, Arizona Department of Water Resources Bulletin 2 (Prepared by the U.S. Geological Survey), available online at: http://www.verde.org/usgs/usgsstud.html.