Begun in 1934, The Proceedings of the Indian Academy of Sciences : Earth and Planetary Sciences is a quarterly journal in English published by the Indian Academy of Sciences. The journal basically aims to expose new results or ideas or conceptual advances made towards defining the structure, evolutionary processes and sensitivities of significant earth system elements. Particularly welcome are papers that address important features of the solid earth, ocean and atmosphere unique to this part of the world, yet of wider implications to our understanding of planetary systems. Also welcome are papers on incisive approaches and methodologies especially developed to enhance definitiveness of scientific inference. Short communications relating to significant new findings or potentially stimulating ideas are also invited.