1991-92 - Birbal Sahni Institute of Palaeobotany

1991-92A fossil leaf and fruit resemblingMesuQ [urea from Makum CoaJrield,Assam.and phytogeographyFossil woods of Dipterocarpus (Dipterocarpaceae), Canarium (Burseraceae),Euphoria, (Sapindaceae), Julbernardia, (Fabaceae), Barringtonia (Lecyihidaceae),Madhuca and Manilkara (Sapotaceae) have been identified from Namsang bedsnear Deomali, Arunachal Pradesh. Of these, Julbernardia is an African genus andsuggests phylOgeographicallinkage of Africa with the Indian subcontinent duringNeogene.This genus disappeared from India perhaps at the close of Pliocene, like manyother African and Malaysian elements.A fruit of the genus Mesua has been identified from Tirap Colliery of MakumCoalfield, Assam. It further confirms wider distribution of this genus in northeastIndia during Oligocene.From the Upper Palaeocene sediments near Laitryngew, Khasi Hills, a leaf ofMangifera has been identified. This supports the view that the genus Mangiferaappeared first in the Upper Palaeocene in the Indian subcontinent.N. Awasthi and R.C. MehrotraProgramme 6.2Objective: Palynostratigraphy of sedimentary rocks InTherriaghat Section and its correlation withJaintia and Garo Hills sediments: To work out palynostratigraphy of different Tertiaryformations35