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Before the Dams: Geology of the Columbia Gorge


Join Dr. Jim O'Connor, US Geological Survey, Sunday, June 18, 2017 at 2 p.m., for "Before the Dams: Geology of the Columbia Gorge" at Columbia Gorge Discovery Center and Museum, 5000 Discovery Drive, The Dalles, Oregon.

Dr. Jim O'Connor will offer a look at the geological record of floods, landslides and lava flows in the Columbia River Gorge. His presentation will include photos taken before the dams went into operation, showing geological landmarks of the gorge, many of which are now underwater.

The Columbia River Gorge is the amazing intersection of geologic processes involving volcanism and uplift of the Cascade Range pitted against the power of the Columbia River. Lava flows and lan...

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