World’s second oldest rock has been discovered in Odisha state


  • The world’s second oldest rock dating back to 4.2 billion years has been discovered in Indian state, Odisha as was reported during May 2018.
  • A rock sample recovered nearly eight years ago from Champua in Odisha’s Kendujhar district has put India at the forefront of geological research in the world.
  • Geologists from the University of Calcutta and Curtin University, Malaysia, along with researchers from the Chinese Academy of Geological Sciences, Beijing, made the discovery, which was published during May 2018 in ‘Scientific Reports’ journal.
  • The only instance of zircon older than this discovery was the one found in Jack Hill, Western Australia, which was 4.4 billion years old and is the oldest known rock sample.