Geologic Map of Detrital, Hualapai, and Sacramento Valleys and Surrounding Areas, Northwest Arizona
The USGS released a compilation 1:250,000-scale geologic map and report covering the Detrital,
Hualapai, and Sacramento valleys in northwest Arizona, with the purpose of "improving understanding of the geology and geohydrology
of the basins beneath those valleys." The map was compiled from existing
geologic mapping, augmented by digital photogeologic reconnaissance
mapping. The most recent geologic map for the area, and the only digital
one, is the 1:1,000,000-scale Geologic Map of Arizona by AZGS.
Ref: Beard, L. Sue, Kennedy, Jeffrey, Truini, Margot, and Felger, Tracey,
2011, Geologic map of Detrital, Hualapai, and Sacramento Valleys and
surrounding areas, northwest Arizona: U.S. Geological Survey Open-File
Report 2011–1225, pamphlet 43 p., 1 map sheet, scale 1:250,000,
available at http://pubs.usgs.gov/of/2011/1225/.