Study of sedimentological and palaeontological aspects of any fossiliferous limestone unit has utmost importance for deciphering existed palaeoenvironmental conditions during their deposition, their depositional history, there characterization and determination of relative age. The palynofacies analysis which includes quantitative and qualitative study of the total particulate organic matter assemblage of rocks, attempted in the present work may also provide significant palaeoenvironmental information. The carbonates which contains very low body fossils without marked sedimentation break, establishment of biostratigraphy proof as a great challenge to biostratigraphers. However, palynofacies can be a very good tool for establishment and refining of biostratibraphy, and interpretation of palaeoenvironment of such rocks. Hence the present work is a humble attempt to study the sedimentological, palaeontological and palynofacies characteristics of the Lakadong Limestone of Mawsynram of Meghalaya, NE India as a part of globally extended Late Palaeocene-Early Eocene carbonate sedimentation phase as well as evaluation of the related depositional processes and environments in these views.