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Mount Si
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==Oceanic plate volcano== [[Image:Si Winter 012.jpg|thumb|Mt. Si in winter,<br>from the town of North Bend]] Mount Si is a remnant of an oceanic plate volcano and the rocks are highly metamorphosed.<ref>{{cite summitpost |id=496671 |name=Mount Si Natural Resources Conservation Area (NRCA) |accessdate=2011-05-07}}</ref> The rock deposits are a melange including metagabbro, and are Jurassic-Cretaceous in age.<ref name="Surficial geologic map of the Skykomish and Snoqualmie Rivers area, Snohomish and King Counties, Washington">{{cite web |title=U.S. Geological Survey |url=https://ngmdb.usgs.gov/Prodesc/proddesc_9900.htm}}</ref>
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