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Downtown PDX Geology Tour - August 22nd, 2015

Geological Society of the Oregon Country (GSOC)

Downtown Geology Video

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Downtown PDX Geology Tour - August 22nd, 2015

Downtown PDX Geology Tour - August 22nd, 2015

Downtown PDX Geology Tour - August 22nd, 2015

Downtown PDX Geology Tour - August 22nd, 2015

GSOC • P.O. Box 907 • Portland, OR 97207 • webmaster@gsoc.org