Description: <DIV STYLE="text-align:Left;"><P STYLE="font-size:16ptmargin:7 0 7 0;"><SPAN><SPAN>Formation thickness maps of the Navajo Sandstone, the principal component of the Glen Canyon Group, were digitized from Freethey and others (1988).</SPAN></SPAN></P><DIV><P><SPAN /></P></DIV></DIV>
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.