171. West-east stratigraphic transect of Cretaceous rocks in the northern Rocky Mountains and Great Plains regions, southwestern Montana to southwestern Minnesota Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by U.S. Geological Survey Information Services Resource Type: Map Access & Availability: Loading
172. World map showing surface and subsurface distribution and lithologic character of Middle and Late Neoproterozoic rocks Author/Creator: Stewart, J. H., 1928-2013 Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2007 Resource Type: Map Access & Availability: Loading