Search Results       Your search for [subject]Geology -- Oregon -- Willamette River Valley returned 1 record.           Origin, extent, and thickness of quaternary geologic units in the Willamette Valley, Oregon. Denver, CO: For sale by the U.S. Geological Survey, Information Services, 2001. Subject: Geology, Stratigraphic -- Quaternary; Geology -- Oregon -- Willamette River Valley.          Add to Book Cart Relevance: 40.51%