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A first contoured map of the Astoria Canyon complex off the entrance to the Columbia River Picture

A first contoured map of the Astoria Canyon complex off the entrance to the Columbia River

A first contoured map of the Astoria Canyon complex off the entrance to the Columbia River. In: Francis P. Shepard, “Submarine Valleys.” The Geographical Review, Volume XXIII, 1933, p. 86.

Author: Archival Photography by Steve Nicklas, NOS, NGS/ NOAA

License: Public Domain Mark 1.0 (Public domain)
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Added On
18th October 2015
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