1. Geologic map of the Greater Portland Metropolitan Area and surrounding region, Oregon and Washington Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2020 Format: Map Access & Availability: Loading
2. Geologic map of the state of Hawaii Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Reston, Virginia] : U.S. Department of the Interior, U.S. Geological Survey, 2021 Format: Map Access & Availability: Loading