This book includes the basics and published and unpublished data on thermal properties, density-porosity-permeability, electrical properties, seismic properties, magnetic properties and natural radioactivity at NTP and for some properties at elevated temperatures for crust-mantle rocks and minerals with special reference to Deccan Basalts, their units, measurement techniques, co-relation with other geophysical parameters and applications. The writing of the book is sponsored by the Department of Science and Technology (DST) New Delhi for the benefit of the students, research scholars and scientists.