1. 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
2. Wetlands of modern and ancestral lakes Erie and St. Clair, Michigan, Ohio, Indiana, Pennsylvania, and New York, U.S.A., and Ontario, Canada Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading