Mauritia (microcontinent)

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Mauritia was a Precambrian microcontinent that broke away as India and Madagascar separated some 60 million years ago.[1][2][3] Evidence consists of detrital zircon found in rock (6-million-year-old Trachyte).[4] Analyses of the zircon crystals produced dates between 660 and 1,970 million years and are considerably older than the 8.9-million-year-old basalt that constitutes the oldest formations on the island. The zircons are interpreted to have been brought up from buried continental crust as fragments entrained as xenocrysts within the basalt.[5] Interpretation of a linear northwest–southeast gravity anomaly indicates the microcontinent may extend 1,500 kilometres (930 mi) from the Seychelles to Mauritius roughly parallel to the Indian Ocean oceanic ridge.[6]

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References[edit]

  1. ^ Torsvik, Trond H.; Amundsen, Hans; Hartz, Ebbe H.; Corfu, Fernando; Kusznir, Nick; Gaina, Carmen; Doubrovine, Pavel V.; Steinberger, Bernhard; Ashwal, Lewis D.; Jamtveit, Bjørn (24 February 2013). "A Precambrian microcontinent in the Indian Ocean" (PDF). Nature Geoscience. doi:10.1038/ngeo1736. ISSN 1752-0894. Retrieved 5 December 2015. 
  2. ^ Anderson, Natali (25 February 2013). "Geoscientists Discover Continent Hidden Under Lava in Indian Ocean". Sci-News.com. Retrieved 25 February 2013. 
  3. ^ St. Fleur, Nicholas (2017-02-03). "In the Indian Ocean, Fragments of a Continent Where They Should Not Be". New York Times. p. D2. Retrieved 2017-02-09. It’s true that geologists have found something strange under the island of Mauritius, the former British colony east of Madagascar with a population of 1.3 million. They’re calling it “Mauritia.” But it’s not a continent like you all are. As Lewis D. Ashwal, the researcher who made the discovery, put it: “It’s a continent in the geological sense, not in the geographical one.” 
  4. ^ "Researchers confirm the existence of a 'lost continent' under Mauritius". Phys.org. 31 January 2017. Retrieved 3 February 2017. 
  5. ^ Perkins, Sid (24 February 2013). "Long-lost continent found under the Indian Ocean". Nature. doi:10.1038/nature.2013.12487. Retrieved 25 February 2013. 
  6. ^ "Ancient micro-continent under the Indian Ocean identified". SpaceDaily. 7 March 2013. 

Coordinates: 12°10′49.11″S 61°10′1.64″E / 12.1803083°S 61.1671222°E / -12.1803083; 61.1671222