Charonockite, St. Thomas Mount, Chennai
Charonockite, St. Thomas Mount, Chennai is a typical exposure of quartz-feldspar-hypersthene rock, characterized by presence
of two pyroxene facies metamorphism. The name �Charnockite� originated from the use of the same rock as tombstone of Job Charnock,
the founder of Kolkata. The constituents of the rock suggest of its origin in particularly 'dry' and high temperature condition
and believed to have important bearing in elucidating primordial crustal evolution of the earth.