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State of Oregon Department of Geology and Mineral Industries

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John Day River near Ritter, Grant County. Rock layers are Picture Gorge Basalt flows, part of the regionally widespread 15 to 17 million year old Columbia River Flood Basalt Province. Photograph by Jason McClaughry.

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Interpretive Map 60, Landslide hazard and risk study of Eugene-Springfield and Lane County, Oregon, by Nancy C. Calhoun, William J. Burns, Jon J. Franczyk, and Gustavo Monteverde.
Geologic Map 121, Geologic map of the Devine Ridge North 7.5' quadrangle, Harney County, Oregon, by Robert A. Houston, Jason D. McClaughry, Carlie J. M. Duda, and Clark A. Niewendorp.
Maritime Tsunami Response Guidance (MTRG): MTRG-2018-OR-01, Port of Astoria and lower Columbia River estuary, by Jonathan C. Allan
Special Paper 51, Columbia River tsunami modeling: Toward improved maritime planning response by Jonathan C. Allan, Joseph Zhang, Fletcher E. O'Brien, and Laura L. Gabel.
Special Paper 50, Flood risk assessment for the Columbia Corridor drainage districts in Multnomah County, Oregon, by Christina A. Appleby and John M. Bauer

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