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climate change which have played a major role (when India separated from Gondwanaland). Most tropical biota were evolved during the K/T boundary (66 m.y.). Cretaceous to early Paleogene was the warmest time and no ice caps were found. Quaternary was characterized by repeated glacial and interglacial cycles. During the Cretaceous period warm water currents and sea floor spreading took place. Due to massive volcanic activity, CO2, SiO2 and supply of nutrients were more in oceans. Extinction of dinosaurs and origin of mammals due to 95% of calcareous primary productivity took place during this time. She also explained about the grasses in Cretaceous (65 m.y.) due to special photosynthetic pathway and Gondwanatherian mammals adopted to eating abrasive grasses as revealed by grass phytoliths. Archaeological and paleoecological studies have also revealed dietary habits of animals during this time. Rice cuticles from Cretaceous (grass remains and grass pollens) revealed that mammal teeth adopted for grass eating. Tropical paleobiodiversity from pollen (Palaeocene to Eocene) from the coal and lignite deposits can be comparable with the Western Ghat species (Diptercorpus pollen). She stressed the importance of palaeo-botanical studies in understanding the past climatic conditions and evolution of life. The symposium was attended by the students of summer research fellows of all the three academies in India (Indian Academy of Sciences, Indian National Science Academy and National Academy of Sciences, India), fellows of the Academy, teachers and students from different science colleges. Participants had glimpses of early history of the earth, evolution and early climate. Specimens of dinosaur eggs, rodents teeth, shells, calcite mineral and fossil trilobites were shown.

A Note on XXII International Society for Photogrammetry and Remote Sensing Congress, Melbourne 2012, Australia