1. Geologic map of the Amboy quadrangle, Clark and Cowlitz counties, Washington Author/Creator: Geological Survey (U.S.) Publication/Creation: [Reston, VA] : U.S. Dept. of the Interior, U.S. Geological Survey, 2005 Resource Type: Map Edition: Version 1.0. Access & Availability: Loading
2. Geologic map of the Ariel quadrangle, Clark and Cowlitz counties, Washington Author/Creator: Evarts, Russell C. Publication/Creation: [Reston, Va.] : U.S. Geological Survey ; Denver, CO : USGS Information Services [distributor], 2004 Resource Type: Map Access & Availability: Loading
3. Geologic map of the Camas quadrangle, Clark County, Washington, and Multnomah County, Oregon Author/Creator: Evarts, Russell C. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2008 Resource Type: Map Edition: Version 1.0. Access & Availability: Loading
4. 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 Resource Type: Map Access & Availability: Loading
5. Geologic map of the Lacamas Creek quadrangle, Clark County, Washington Author/Creator: Evarts, Russell C. Publication/Creation: [Reston, Va.] : U.S. Geological Survey, 2006 Resource Type: Map Edition: Version 1.0. Access & Availability: Loading
6. Geologic map of the Ridgefield quadrangle, Clark and Cowlitz Counties, Washington Author/Creator: Evarts, Russell C. Publication/Creation: [Reston, Va.?] : U.S. Geological Survey, 2004 Resource Type: Map Edition: Version 1.1. Access & Availability: Loading
7. Geologic map of the Saint Helens quadrangle, Columbia County, Oregon, and Clark and Cowlitz counties, Washington Author/Creator: Evarts, Russell C. Publication/Creation: [Reston, Va.] : U.S. Geological Survey ; Denver, CO : USGS Information Services [distributor], 2004 Resource Type: Map Access & Availability: Loading
8. Geologic map of the Sauvie Island quadrangle, Multnomah and Columbia Counties, Oregon, and Clark County, Washington Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2016 Resource Type: Map Access & Availability: Loading
9. Geologic map of the Vancouver and Orchards quadrangles and parts of the Portland and Mount Tabor quadrangles, Clark County, Washington, and Multnomah County, Oregon Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Reston, Va. : U.S. Department of the Interior, U.S. Geological Survey, 2016 Resource Type: Map Access & Availability: Loading
10. Geologic map of the Washougal quadrangle, Clark County, Washington, and Multnomah County, Oregon Author/Creator: Evarts, Russell C., author Publication/Creation: Reston, Va. : U.S. Department of the Interior, U.S. Geological Survey, 2013 Resource Type: Map Access & Availability: Loading