Description: Formation thickness maps of the Navajo Sandstone, the principal component of the Glen Canyon Group, were digitized from Freethey and others (1988).
Service Item Id: a7a448d1c9bb4485bf01268af9c56537
Copyright Text: Freethey, G. W., Kimball, B. A., Wilberg, D. E., and Hood, J. W., 1988, General hydrogeology of the aquifers of Mesozoic age, upper Colorado River basin—excluding the San Juan Basin—Colorado, Utah, Wyoming, and Arizona: U.S. Geological Survey, Hydrologic Investigations Atlas HA-698, scale 1:2,500,000, 2 sheets.