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Lidar imagery of the Portland area and the Willamette Valley shows many flood features in great detail.  I know of no annotated imagery that points out all the flood features, but there is a brief description of some of the major features and an accompanying lidar image in the online Field Trip guide "Portland, Oregon, geology by tram, train, and foot" found at

http://www.oregongeology.org/pubs/OG/OGv69n01-PDXtram.pdf

you can also find a new geologic map of Oregon that shows where the floods deposited sediemnts at

http://www.oregongeology.org/sub/publications/IMS/ims-028/index.htm

posted 2 years, 7 months ago
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