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Confluence of the Deschutes and Columbia rivers

By Geology, Minerals, Energy, and Geophysics Science Center
Photograph of scientists standing on rocks above a steep canyon
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Detailed Description

An enigmatic outcrop of 5 million year old basalt sits 300 meters above the Deschutes and Columbia rivers. USGS scientists are carefully studying this basalt flow to determine if it came all the way from central Oregon, 160 kilometers away.

Sources/Usage

Public Domain.