1. Precambrian basement map of the Trans-Hudson orogen and adjacent terranes, northern Great Plains, U.S.A Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by U.S. Geological Survey Map Distribution Resource Type: Map Access & Availability: Loading
2. Preliminary tectonostratigraphic terrane map of the central and southern Appalachians Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by U.S. Geological Survey, Map Distribution Resource Type: Map Access & Availability: Loading