The oldest rocks within the Kachchh Basin belong to the sediments of Kaladongar Formation exposed in Kuar Bet, Pachchham Island (western India). The Formation’s lowest unit, the Dingi Hill Member has yielded a moderately diversified calcareous nannofossil assemblage that includes the marker species of Lotharingius contractus and Triscutum sullivanii of late Early Aalenian age associated with re...

Extended shallow carbonate platform, pelagic, and drift deposits were drilled during International Ocean Discovery Program (IODP) Expedition 359 in the Inner Sea of Maldives. These sediments yield rich well-diversified benthic, planktonic foraminiferal nannofossil assemblages spanning from early Oligocene to Recent. We present here shore-based revised integrated biostratigraphy these microfossi...

Abstract. The fossil record of marine microplankton provides insights into the evolutionary drivers which led to origin modern deep-water plankton, one largest components ocean biomass. We use global abundance and biogeographic data, combined with depth habitat reconstructions, determine environmental mechanisms behind speciation in two groups pelagic microfossils over past 15 Myr. compare our ...