A. B. Roy, MSc, 1961; PhD, 1965 (Jadavpur University) is a Retired Professor of Geology at M.L. Sukhadia University. He was a Fellow of the Alexander von Humboldt Foundation for post-doctoral work at Rurh University in 1975-76. He was elected Fellow of the Indian Science Academy, Bangalore, in 1989, and the Indian National Science Academy, New Delhi, in 1990. He has published two books, a number of edited volumes, and over 120 research papers and scientific reviews on different aspects of Earth science.