Ninety East Ridge

The Ninety East Ridge at the centre of the picture and the Chagos-Laccadive Ridge on the upper left side

The Ninety East Ridge (also rendered as Ninetyeast Ridge, 90E Ridge or 90°E Ridge) is a mid-ocean ridge on the Indian Ocean floor named for its near-parallel strike along the 90th meridian at the center of the Eastern Hemisphere. It is approximately 5,000 kilometres (3,100 mi) in length and can be traced topographically from the Bay of Bengal southward towards the Southeast Indian Ridge (SEIR), though the feature continues to the north where it is hidden beneath the sediments of the Bengal Fan. The ridge extends between latitudes 31°S and 9°N and has an average width of 200 km (120 mi).[1]

  1. ^ Stein, S.; Okal, W. A. (1974). "Seismicity and Tectonics of the Ninetyeast Ridge Area: Evidence for Internal Deformation of the Indian Plate" (PDF). Journal of Geophysical Research. 83 (B5): 2233. Bibcode:1978JGR....83.2233S. doi:10.1029/jb083ib05p02233. Retrieved 23 May 2015.