This monograph presents the salient results of geophysical and geological study of the Project B2.3 "The Crustal Structure of the Indian Ocean floor" under the Integrated Long Term Programme (ILTP) of scientific and technical coopertion between former USSR and India. The participants of the project are: From Indian side- National Institute of Oceanography (NIO), Goa and Regional Centre (NIO), Visakhapatnam, National Geophysical Research Institute (NGRI) ...