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Data sets Publications Expeditions Thesaurus
Astoria Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Neogene
 ....Miocene
 .....Astoria Formation
RTWashington
 Oregon
SNLower to middle Miocene. NW Oregon and SW Washington. Added to Thesaurus in 1985.