The hotspot is believed to have been active for over 65 million years. A huge eruption of this hotspot 65 million years ago is thought to have laid down the Deccan Traps, a vast bed of basalt lava that covers part of central India, and opened a rift which separated India from the Seychelles Plateau. The Deccan Traps eruption coincided roughly with the nearly antipodalChicxulub impactor and the Cretaceous–Paleogene extinction of the dinosaurs, and there is considerable speculation that the three events were related.[2][3] As the Indian plate drifted north, the hotspot continued to punch through the plate, creating a string of volcanic islands and undersea plateaux. The Laccadive Islands, the Maldives, and the Chagos Archipelago are atolls resting on former volcanoes created 60–45 million years ago that subsequently submerged below sea level. About 45 million years ago the Central Indian Ridge crossed over the hotspot, and the hotspot passed under the African Plate.
The hotspot appears to have been relatively quiet 45–10 million years ago, when activity resumed, creating the Mascarene Islands, which include Mauritius, Réunion, and Rodrigues. Mauritius and Rodrigues Ridge were created 8–10 million years ago, and Rodrigues and Réunion Islands in the last two million years. Piton de la Fournaise, a shield volcano on the southeastern corner of Réunion, is one of the most active volcanoes in the world.[4]
Referencesedit
^E. V. Verzhbitsky (2003). "Geothermal regime and genesis of the Ninety-East and Chagos-Laccadive ridges". Journal of Geodynamics. 35 (3): 289–302. Bibcode:2003JGeo...35..289V. doi:10.1016/S0264-3707(02)00068-6.
^Renne, P. R.; et al. (2015). "State shift in Deccan volcanism at the Cretaceous-Paleogene boundary, possibly induced by impact". Science. 350 (6256): 76–78. Bibcode:2015Sci...350...76R. doi:10.1126/science.aac7549. PMID 26430116.
^Sprain, Courtney J.; Renne, Paul R.; Vanderkluysen, Loÿc; Pande, Kanchan; Self, Stephen; Mittal, Tushar (21 February 2019). "The eruptive tempo of Deccan volcanism in relation to the Cretaceous-Paleogene boundary". Science. 363 (6429): 866–870. Bibcode:2019Sci...363..866S. doi:10.1126/science.aav1446. PMID 30792301.
^Klemetti, Erik (2014). "New Eruption at Piton de la Fournaise on Reunion Island". Wired. from the original on 22 June 2014.
External linksedit
Origin and compensation of Chagos-Laccadive ridge, Indian ocean, from admittance analysis of gravity and bathymetry data
George, Robin (2021-09-15). "A Massive Subterranean 'Tree' Is Moving Magma to Earth's Surface". Quanta Magazine. - an article accompanied with an interactive model of the hotspot
December 15, 2023
réunion, hotspot, volcanic, hotspot, which, currently, lies, under, island, réunion, indian, ocean, chagos, laccadive, ridge, southern, part, mascarene, plateau, volcanic, traces, piton, fournaise, active, shield, volcano, formed, countryfranceregionréunioncoo. The Reunion hotspot is a volcanic hotspot which currently lies under the island of Reunion in the Indian Ocean The Chagos Laccadive Ridge and the southern part of the Mascarene Plateau are volcanic traces of the Reunion hotspot 1 Reunion hotspotPiton de la Fournaise an active shield volcano formed by the Reunion hotspotCountryFranceRegionReunionCoordinates21 06 S 55 30 E 21 1 S 55 5 E 21 1 55 5The hotspot is believed to have been active for over 65 million years A huge eruption of this hotspot 65 million years ago is thought to have laid down the Deccan Traps a vast bed of basalt lava that covers part of central India and opened a rift which separated India from the Seychelles Plateau The Deccan Traps eruption coincided roughly with the nearly antipodal Chicxulub impactor and the Cretaceous Paleogene extinction of the dinosaurs and there is considerable speculation that the three events were related 2 3 As the Indian plate drifted north the hotspot continued to punch through the plate creating a string of volcanic islands and undersea plateaux The Laccadive Islands the Maldives and the Chagos Archipelago are atolls resting on former volcanoes created 60 45 million years ago that subsequently submerged below sea level About 45 million years ago the Central Indian Ridge crossed over the hotspot and the hotspot passed under the African Plate The hotspot appears to have been relatively quiet 45 10 million years ago when activity resumed creating the Mascarene Islands which include Mauritius Reunion and Rodrigues Mauritius and Rodrigues Ridge were created 8 10 million years ago and Rodrigues and Reunion Islands in the last two million years Piton de la Fournaise a shield volcano on the southeastern corner of Reunion is one of the most active volcanoes in the world 4 References edit E V Verzhbitsky 2003 Geothermal regime and genesis of the Ninety East and Chagos Laccadive ridges Journal of Geodynamics 35 3 289 302 Bibcode 2003JGeo 35 289V doi 10 1016 S0264 3707 02 00068 6 Renne P R et al 2015 State shift in Deccan volcanism at the Cretaceous Paleogene boundary possibly induced by impact Science 350 6256 76 78 Bibcode 2015Sci 350 76R doi 10 1126 science aac7549 PMID 26430116 Sprain Courtney J Renne Paul R Vanderkluysen Loyc Pande Kanchan Self Stephen Mittal Tushar 21 February 2019 The eruptive tempo of Deccan volcanism in relation to the Cretaceous Paleogene boundary Science 363 6429 866 870 Bibcode 2019Sci 363 866S doi 10 1126 science aav1446 PMID 30792301 Klemetti Erik 2014 New Eruption at Piton de la Fournaise on Reunion Island Wired Archived from the original on 22 June 2014 External links editOrigin and compensation of Chagos Laccadive ridge Indian ocean from admittance analysis of gravity and bathymetry data George Robin 2021 09 15 A Massive Subterranean Tree Is Moving Magma to Earth s Surface Quanta Magazine an article accompanied with an interactive model of the hotspot Retrieved from https en wikipedia org w index php title Reunion hotspot amp oldid 1163863761, wikipedia, wiki, book, books, library,
