Steep canyon walls comprising massive, Jurassic-age, Navajo Sandstone (?) standing up the shores of Lake Powell, Arizona/Utah. This image was captured as part of a collaborative geophysical research effort involving the USGS Utah Water Science Center and the Woods Hole Coastal and Marine Science Center to document the bathymetry of the lake and characterize shallow sediment deposition near the mouths of the San Juan and Colorado. (Credit: Wayne Baldwin. Public domain.)
Online resource:
Chidsey, Jr, and others, 2000, Geologic Lake Guide along Lake Powell, Glen Canyon National Recreation Area and Rainbow Bridge National Monument, Utah-Arizona. 76 p, lavishly illustrated with photographs, maps and stratigraphic column. http://www.lakepowell.org/documents/Lake%20Powell%20Geologic%20Guide.pdf
