Peck, D.L., 1961, Geologic map of Oregon west of the 121st Meridian: U.S. Geological Survey, Miscellaneous Geologic Investigations Map I-325, scale 1:500,000
Sheet 1 of 2: Geologic Map of Oregon West of the 121st Meridian
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Peck, D.L., 1961, Geologic map of Oregon west of the 121st Meridian: U.S. Geological Survey, Miscellaneous Geologic Investigations Map I-325, scale 1:500,000
Sheet 1 of 2: Geologic Map of Oregon West of the 121st Meridian
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