Figure F17. Photomicrographs of radiolarian assemblage examples, Site U1404. A. Large orosphaerid radiolarians common in Zone RN1. Inset is focused on background to show relative size of typical radiolarians (Sample 342-U1404A-12H-CC). B. Orosphaerid fragment as seen under transmitted light (Sample 342-U1404A-12H-CC). C. Typical lowermost Miocene radiolarian assemblage, Zone RP22. Calocycletta robusta is in the lower right corner, and Dictyocoryne sp. is in the upper center of the image (Sample 342-U1404A-16H-CC). D. Typical middle Eocene assemblage, Zone RP14 (Sample 342-U1404A-36X-CC).
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