TV

Oregon Field Guide

Elk Rock in Willamette River


Millions of years ago, the Pacific Ocean covered the area where Portland now stands. An underwater volcano grew to a mountain the size of Mount Hood. That mountain is now the small outcropping known as Elk Rock Island — nearly all of its mass is buried in sediment and later lava flows.

First Broadcast: 1999
Producer: Jim Newman

Comments

blog comments powered by Disqus

More Oregon Field Guide

More OPB

Follow Oregon Field Guide

Send Oregon Field Guide A Message


Part of Episode