TNPSC Thervupettagam

Giant ‘gravity hole’ in Indian Ocean

July 12 , 2023 491 days 643 0
  • Researchers at the Indian Institute of Science have revealed the secrets of the giant gravity hole in the Indian Ocean.
  • It is known as the Indian Ocean Geoid Low (IOGL).
  • Discovered in 1948, just south of Sri Lanka, by Dutch geophysicist Felix Andries Vening Meinesz.
  • It covers over two million square miles and sits around 600 miles beneath the Earth's crust.
  • The huge anomaly has significantly lower gravity than the average.
  • The presence of lighter materials in the upper to mid-mantle, were responsible for the gravity low in this region.
  • This mantle structure beneath the Indian Ocean was probably produced by the leftovers of a long-lost Tethys Ocean's seabed.

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