Dr. B.K. Chakrabarti is retired Director of the Geological Survey of India and a Sir J.Coggin Brown Gold Medalist for his work on Precambrian geology. Dr. Chakrabarti served the Geological Survey of India for over 35 years and has published more than 40 articles and three books on the Himalayas. He is also Fellow of the Indian W.B. Academy of Science and Technology, the Geological Society of India, and The Mining, Geological & Metallurgical Institute of India. Dr. Chakrabarti has been lecturing and working in associated universities for over four decades.