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Figure F19. Diatom, planktonic foraminifer, and radiolarian datum species, Site U1418. Primary datums that define biozones and secondary datums are illustrated. Black bars in the Biozone columns show the uncertainty in the depths of the observed biohorizons. The number within the black bars indicates the age of the biozone boundary. JM = Jaramillo. NPD = Neogene North Pacific Diatom zone of Yanagisawa and Akiba (1998), CM = California margin. LO = last occurrence.

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