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Tualatin River Watershed
Remove constraint Tualatin River Watershed
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Basalt -- Oregon -- Multnomah County
Remove constraint Subject: Basalt -- Oregon -- Multnomah County
Database
PDX Scholar
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Approximately 150 meters (500 feet) of Grande Ronde Basalt and 140 meters (450 feet) of Wanapum Basalt of the Columbia River Basalt Group are exposed in the Bull Run Watershed. In Bull Run, the Grande ...
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