1. Thermal maturity map of Devonian shale in the Illinois, Michigan, and Appalachian Basins of North America Publication/Creation: [Reston, Virginia] : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, Colo. : For sale by U.S. Geological Survey, 2012 Resource Type: Map Access & Availability: Loading
2. Geologic map of upper Eocene to Holocene volcanic and related rocks of the Cascade Range, Oregon Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : Map Distribution [distributor] Resource Type: Map Access & Availability: Loading