Planktic Foraminifera from the Niniyur Formation, Cauvery Basin, Southern India

The study records the occurrence of sparse but well preserved planktic foraminifera from the Niniyur Formation of the Cauvery Basin, Tamil Nadu, South India. Planktic foraminifera from several outcrops of Niniyur Formation were analyzed to determine their age. Samples of Niniyur Formation have yielded well preserved planktonic foraminifera belonging to the genera Globanomalina, Acarinina and Morozovella. Seven planktic species were recorded viz Globanomalina.pseudomenardii (Bolli), G. chapmani (Parr), Eoglobigerina spiralis (Bolli), Acarinin mckannai (White), Morozovella.praecursoria (Morozova), M. conicotruncata (Subbotina) and M. cf. trinidadensis (Bolli). These forams are important biostratigraphic and paleogeographic indicators. These indicate an Early to Late Paleocene Zones (P2 to P5) age for the Niniyur Formation of Cauvery Basin.