Dam Breaks and Alluvial Cycles, Pleasant Valley ... - NORFMA
Dam Breaks and Alluvial Cycles, Pleasant Valley ... - NORFMA
Dam Breaks and Alluvial Cycles, Pleasant Valley ... - NORFMA
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Regional Geology<br />
- Columbia River Basalts (CRBs)<br />
(17-14 million yr ago)<br />
- Yakima Fold Belt<br />
(age debated)<br />
- Missoula Floods deposits<br />
( ~15 thous<strong>and</strong> yr ago)<br />
- Loess deposition during <strong>and</strong> after<br />
glacial periods<br />
http://www.fs.fed.us/r6/columbia/forest/geology/<br />
INSERT PICTURES<br />
http://vulcan.wr.usgs.gov/Volcanoes/PacificNW/Maps/pacificNW_volcanics.html