1991-92 - Birbal Sahni Institute of Palaeobotany

1991-92,To integrate calcareous nannoplankton and planktonicforaminiferal zonations to improve datingresolution: To record palaeoenvironmental events with specialreference /0 Antarc/ica glaciation event based onplankton assemblage backed by stable isotope andorganic dataThe literature on the Neogene of Andaman and Nicobar region was criticallystudied. Field observations were made and high resolution lithologs prepared.Close sampling was done in Lacam Point Section of Early Miocene age at HavelockIsland to decipher volcanic and quiscent phases related to opening of AndamanSea.S.A. Jafar and Jyotsana RaiPhotodocumentation of calcareous nannofossils recovered from samples ofEast Coast and Nipple Hill sections, was completed. Taxonomy completed forspecies documented under the Light - and Scanning Electron Microscope. Rangeof taxa plotted against prepared lithologs of the two sections. Draft completed onsystematic Palaeontology Chapter of the thesis (Thesis work).Programme 4.4S.A. Jafar and C.P. Singh,Late Cenozoic diatom biostratigraphy of Andamanand Nicobar IslandsObjective:To study morphology and taxonomy of diatomand silicoflagellate taxa from Late Cenozoic surfaceand subsurface sections (type locality/referencesections) of Andaman Nicobar Islands,To establish biozonation for age determination andcorrelation with geologically synchronous beds,To interpret palaeoenvironment, palaeogeographyACliflocyc1us ingefls fromthe Middle Miocene of Kamorta,Andaman and Nicobar Islands.29