The fossil of a minute planktonic organism, especially a calcareous unicellular alga.
- This paper presents high-resolution data from calcareous nannofossils, planktic Foraminifera, palynomorphs and stable isotopes for the Late Albian OAE Id.
- In the seas, the calcareous nannofossils were still in evidence but in shallow waters the benthonic nummulite and other larger foraminifera became very abundant.
- The same samples as used for geochemistry were investigated for their content of calcareous nannofossils.
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