1991-92 - Birbal Sahni Institute of Palaeobotany

1991-92Cyalheaceae, Osmundaceae, Gleicheniaceae, Mataniaeeae, Polypodiaceae,Arecaceae, Malvaceae, Meliaceae, Bombacaceae, Alangiaceae, Caesalpiniaceae,etc. It seems that the sedimentation took place in fresh water condition and therewas plenty of rainfall.B.D.MandaokarProgramme 6.8Objective: Palynostratigraphy of the Kopili Formation ofKhasi and Jaintia Hills, Meghalaya: To establish palynological zones for correlationand dating: To deduce palaeoclimate and depositional environment: To carry out SEM studies of important palynofossils10 trace evolutionary trendsPalynology of the Kopili Formation (Upper Eocene) in the type area wascompleted. The assemblage consists of 17 genera and 23 species. The dominantgenera are : Retitribrevicolporites, Dictyophyllidites and Polypodiaceaesporites.Cyathidites, Lygodiumsporites, Todisporites and Surmaspora are also occasionallymel with. The palynological assemblage has been compared with other assemblagesof the equivalent formation. They exhibit a marked contrast as there is hardly anydominant common clements in the assemblages. In the type locality,Retitribrevicolporites is the most common taxon whereas at Garampani it is Operculosculptites.At Umsohryngkew River section Echitricolpites is common andStriatriletes is found in dominance in Jowai Badarpur road section.G.K.TrivediProgramme 6.9 : Comparative palynologicaland Indian Upperaeocene sedimentsstudies of AfricanCretaceous . Pal-Objective : To study Upper Cretaceous - Tertiary palynofossilsfrom Senegal and Tanzania to evaluate palynologicalassemblage and identify common palynofossilmarkers: To trace patterns of migration for deciphering palaeogeographicaldistribution and spread of angiospermtnxa: To explore possibilities of obtaining comparativematerial from southeast AsiltPalynological investigation on the Cretaceous-Tertiary transition in the borehole core no. CM5 drilled in the Atlantic ocean off Senegal Coast, West Africa hasbeen carried out. According to the stratigraphic data provided by Dr. A. Ly,Universite Cheikh Anta Diop, Dakar, Senegal the top of the Maastrichtian ismarked approximately at 9952 m. The present study is aimed to detail out palynologicaldata and correia te with stratigraphic information. Samples of the sediments39