 Complete the following phrase:  In India he oversaw a mapping program that focussed on coal bearing strata. The team of geologists made major discoveries. Henry Benedict Medlicott coined the term Gondwana Series in 1872. Oldhams elder son Richard Dixon Oldham distinguished three types of pressure produced by earthquakes: now known as P compressional, S shear, and L Love-waves, based on his observations made after the 