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Close-up of coccolith specimens showing the excellent preservation state of the coccoliths: (A) Reticulofenestra sp. sample at 42.1 Ma and (B) C. pelagicus sample at 30.0 Ma. Slight etching of the coccoliths may be the result of the microseparation technique, but the absence of notable calcite overgrowth on the coccoliths is evident. Scale bars are inset.
