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Grande Ronde volcano
Remove constraint Grande Ronde volcano
Subject
Geology -- Oregon -- Clatsop County
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Subject
Geology, Stratigraphic -- Tertiary
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Article
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ScholarsArchive
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The middle to late Eocene tholeiitic Tillamook Volcanics compose the oldest rock unit in the Hamlet-North Fork of the Nehalem River area. Geochemical plots and field relationships indicate that these rocks ...
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