Palynology and Paleoenviromental Study: Case study of Upper Cretaceous Sediment, Chad Basin, Nigeria' is an in-depth research work directed towards hydrocarbon exploration and impact of exploitation.On this basis, the High impact palynology approach has been applied to this research work. This has resulted in a development of new geologic concepts and methods of Biostratigraphy causing significant changes in stratigraphic work. This work has documented an high impact palynologic approach in the upper Cretaceous sediments, Chad Basin, Nigeria