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BOARDMAN, 19.8 m. [West of Hwy. 730 Junction] (250 alt., 100 pop.), lies in an area that holds the fossilized remains of many prehistoric animals. Specimens include part of a mastodon tooth, bones of fishes, of the three toed horse, of the rhinoceros, and bits of turtle shell.
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On a slight knoll (R) at 19.7 m. [West of Hwy. 730 Junction] is a mounted specimen of Indian picture writing. The engraved boulder was found on the bank of the Columbia River a few miles east of its present location.
Today, these boulders, or ones very similar (reproductions?), are found in Marina Park.