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- noun Plural form of
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As for biostratigraphy, the mass-extinction of foraminifers and nannofossils approximates the K/T boundary much more accurate.
In contrast, the carbon-13 shift and Ir anomaly both of which coincide with the first appearance of Danian planktic foramifera, nannofossils and dinoflagellates and faunal turnovers from Cretaceous to Paleocene assemblages well above the event deposit reliably mark the KT boundary.
Equally unique is the first appearance of Tertiary species in foraminifera, as well as nannofossils and dinoflagellates.
Köthe A, Khan AM, Ashraf M (1988) Biostratigraphy of the Surghar Range, Salt Range, Sulaiman Range and the Kohat area, Pakistan, according to Jurassic through Paleogene calcareous nannofossils and Paleogene dinoflagellates.