National Geologic Map Database
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Title: New molluscan assemblages from the upper member of the Twin River Formation, western Washington: significance in Neogene chronostratigraphy
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Author(s): Addicott, W.O.
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Publishing Organization: U.S. Geological Survey
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Series and Number: Journal of Research of the U.S. Geological Survey V.4-4
- Publication Date: 1976
- Map Scale: 1:117,600
- Cross Section: None
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