1991-92 - Birbal Sahni Institute of Palaeobotany

1991-92blages were also compared with other known Palaeocene - Lower Eocene assemblages.K. AmbwaniProgramme 6.4 ,Palynological investigation of the Tertiary sedi·ments of Jaintia and Cachar HillsObjective ,To study morphotaxonomy and affinity of palynofossils,To select ecologically and stratigraphically importantpa/ynotaxa for biostratigraphic zonation, correlationand dating: To infer palaeoclimate and environment of depositionof the sedimentsTwo sections of Disang sediments exposed along HaDong-Silchar Road wereworked out. The samples arc poor in spore-pollen content but rich in other organicmatter. Striatriletes, Lygodiumsporites, Cyathidites, and Polypodiaceae spores aremajor elements in the palynoassemblage. Angiospermous pollen arc poorly represented.Reworked Permian pollen are occasionally met with.J.P.MandaiProgrammeObjective6.5 ,Palynological studies of Khasieeous) and Caro (Late Tertiary)South-Shillong front, Meghalaya(Upper Crela·groups in the,To collect and process samples for quantitativeand qualitative analyses of the palynofloras,To establish palynological zonation for correlationand dating: To infer palaeoclimate and depositional environment,To study extant pollen and spores for comparisonwith extinct spores and pollenOut of fifteen surface exposures of Jadukata and Mahadek formations (LateCretaceous) only four sections (90 samples) were found to be palynologieallyproductive. Containing the following taxa: Triporoletes reticulatus, Densoisporitesvelatus, Appendicisporites potomacensis, Cicatricosisporites dorogensis, C. venus/us,C. hallei, Klukisporites retieuloides, Concavisporites concavus, Dictyophy/liditesmeglllliayensis, Ariadnaesporites intermedius, Minerisporites sp.,Microfoveolatosporis spp., Equestosporites sp., Pseudopolicapollis spp., Basopollissp., Pecakipollis sp., Triangulipollis sp., Complexipollis sp., Neocouperipo/lis sp.,Tricolpites sp., Palamaepollinites eocenieus and Azolla cretacea.R.S. Singh and A. RajanikanthOne hundred samples of Baghmara Formation exposed in Garo Hills of37