Surficial geology and geomorphology of the Tinajas Altas Area, Barry M. Goldwater Air Force Range, Yuma County, southwestern Arizona

This report summarizes the surficial geology and geomorphology of the Tinajas Altas area on the Barry M. Goldwater Air Force Range in southwestern Arizona (Figure 1). The purpose of these investigations is to provide a geologic and geomorphic framework for an archaeological survey of this area. The geologic map included with this report covers parts of several 1:24,000-scale topographic quadrangles that cover the study area (Plate 1). Interpretation of aerial photographs was done primarily by Karen Demsey, with review and field checking by Thomas Biggs, with field assistance from Philip Pearthree of the Arizona Geological Survey. Map compilation and report preparation was done by Biggs; final editing and formatting of this report was done by Pearthree.