Aditya Mishra, H.N.B. Garhwal University, Department of Geology, Srinagar Garhwal, India, Sunil Singh Shah, Hemwati Nandan Bahuguna Garhwal University, Department of Geology, Srinagar Garhwal, India, Argha Banerjee, Indian Institute of Science Education and Research, Pune, India, Earth and Climate Science, Pune, India, H.C. Nainwal, H. N. B. Garhwal University, Srinagar, Uttrakhand, Geology, Srinagar, India and R. Shankar, The Institute of Mathematical Sciences, Chennai, India