Kolkata, Nov 1 (PTI): Dinesh Vitthalrao Ganvir assumed charge as the 55th director general of the Geological Survey of India (GSI) on Sunday, bringing over three decades of experience in geological investigations, mineral exploration and engineering geology, the organisation said in a statemen. PTI SCH NSDNSD(This story is published as part of the auto-generated syndicate wire feed. No editing has been done in the headline or the body by ABP Live.).