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The Indian Plate
Indian Plate
or India
India
Plate is a major tectonic plate straddling the equator in the eastern hemisphere. Originally a part of the ancient continent of Gondwana, India
India
broke away from the other fragments of Gondwana
Gondwana
100 million years ago and began moving north.[2] Once fused with the adjacent Australia to form a single Indo-Australian Plate, recent studies suggest that India
India
and Australia have been separate plates for at least 3 million years and likely longer.[3] The Indian plate includes most of South Asia—i.e. the Indian subcontinent—and a portion of the basin under the Indian Ocean, including parts of South China and western Indonesia,[4][5][6] and extending up to but not including Ladakh, Kohistan and Balochistan.[7][8][9]

Contents

1 Plate movements 2 Geography 3 See also 4 Notes 5 References

Plate movements[edit]

Due to plate tectonics, the India
India
Plate split from Madagascar
Madagascar
and collided (c. 55 Ma) with the Eurasian Plate, resulting in the formation of the Himalayas.

Until roughly 140 million years ago, the Indian Plate
Indian Plate
formed part of the supercontinent Gondwana
Gondwana
together with modern Africa, Australia, Antarctica, and South America. Gondwana
Gondwana
broke up as these continents drifted apart at different velocities,[10] a process which led to the opening of the Indian Ocean.[11] In the late Cretaceous, approximately 100 million years ago and subsequent to the splitting off from Gondwana
Gondwana
of conjoined Madagascar and India, the Indian Plate
Indian Plate
split from Madagascar. It began moving north, at about 20 centimetres (7.9 in) per year,[10] and is believed to have begun colliding with Asia as early as 55 million years ago,[12] in the Eocene
Eocene
epoch of the Cenozoic. However, some authors suggest that the collision between India
India
and Eurasia occurred much later, around 35 million years ago.[13] If the collision occurred between 55 and 50 Mya, the Indian Plate
Indian Plate
would have covered a distance of 3,000 to 2,000 kilometres (1,900 to 1,200 mi), moving faster than any other known plate. In 2012, paleomagnetic data from the Greater Himalaya
Himalaya
was used to propose two collisions to reconcile the discrepancy between the amount of crustal shortening in the Himalaya
Himalaya
(~1300 km) and the amount of convergence between India and Asia (~3600 km).[14] These authors propose a continental fragment of northern Gondwana
Gondwana
rifted from India, traveled northward, and initiated the "soft collision" between the Greater Himalaya
Himalaya
and Asia at ~50 Ma. This was followed by the "hard collision" between India
India
and Asia occurred at ~25 Ma. Subduction
Subduction
of the resulting ocean basin that formed between the Greater Himalayan fragment and India explains the apparent discrepancy between the crustal shortening estimates in the Himalaya
Himalaya
and paleomagnetic data from India
India
and Asia. In 2007, German geologists[10] suggested that the reason the Indian Plate moved so quickly is that it is only half as thick (100 kilometres or 62 miles) as the other plates[15] which formerly constituted Gondwana. The mantle plume that once broke up Gondwana might also have melted the lower part of the Indian subcontinent, which allowed it to move both faster and further than the other parts.[10] The remains of this plume today form the Marion Hotspot (Prince Edward Islands), the Kerguelen hotspot, and the Réunion hotspots.[11][16] As India
India
moved north, it is possible that the thickness of the Indian plate degenerated further as it passed over the hotspots and magmatic extrusions associated with the Deccan and Rajmahal Traps.[11] The massive amounts of volcanic gases released during the passage of the Indian Plate
Indian Plate
over the hotspots have been theorised to have played a role in the Cretaceous–Paleogene extinction event, generally held to be due to a large asteroid impact.[17] The collision with the Eurasian Plate
Eurasian Plate
along the boundary between India and Nepal
Nepal
formed the orogenic belt that created the Tibetan Plateau and the Himalaya
Himalaya
Mountains, as sediment bunched up like earth before a plow. The Indian Plate
Indian Plate
is currently moving north-east at 5 centimetres (2.0 in) per year, while the Eurasian Plate
Eurasian Plate
is moving north at only 2 centimetres (0.79 in) per year. This is causing the Eurasian Plate
Eurasian Plate
to deform, and the Indian Plate
Indian Plate
to compress at a rate of 4 millimetres (0.16 in) per year.[citation needed] Geography[edit] The westerly side of the Indian Plate
Indian Plate
is a transform boundary with the Arabian Plate
Arabian Plate
called the Owen Fracture Zone, and a divergent boundary with the African Plate
African Plate
called the Central Indian Ridge
Central Indian Ridge
(CIR). The northerly side of the Plate is a convergent boundary with the Eurasian Plate forming the Himalaya
Himalaya
and Hindu Kush
Hindu Kush
mountains. See also[edit]

List of tectonic plates List of tectonic plate interactions Paleogeography

Notes[edit]

^ "Sizes of Tectonic or Lithospheric Plates". Geology.about.com. 2014-03-05. Retrieved 2016-01-13.  ^ Oskin, Becky (2013-07-05). "New Look at Gondwana's Breakup". Livescience.com. Retrieved 2016-01-13.  ^ * Stein, Seth; Sella, Giovanni F.; Okai, Emile A. (2002). "The January 26, 2001 Bhuj Earthquake
Earthquake
and the Diffuse Western Boundary of the Indian Plate" (PDF). Geodynamics Series. American Geophysical Union: 243–254. doi:10.1029/GD030p0243. Retrieved 2015-12-25.  ^ Sinvhal, Understanding Earthquake
Earthquake
Disasters, page 52, Tata McGraw-Hill Education, 2010, ISBN 978-0-07-014456-9 ^ Harsh K. Gupta, Disaster management, page 85, Universities Press, 2003, ISBN 978-81-7371-456-6 ^ James R. Heirtzler, Indian ocean geology and biostratigraphy, page American Geophysical Union, 1977, ISBN 978-0-87590-208-1 ^ M. Asif Khan, Tectonics of the Nanga Parbat syntaxis and the Western Himalaya, page 375, Geological Society of London, 2000, ISBN 978-1-86239-061-4 ^ Srikrishna Prapnnachari, Concepts in Frame Design, page 152, Srikrishna Prapnnachari, ISBN 978-99929-52-21-4 ^ A. M. Celâl Şengör, Tectonic evolution of the Tethyan Region, Springer, 1989, ISBN 978-0-7923-0067-0 ^ a b c d Kind 2007 ^ a b c Kumar et al. 2007 ^ Scotese 2001 ^ Aitchison, Ali & Davis 2007 ^ van Hinsbergen, D.; Lippert, P.; Dupont-Nivet, G.; McQuarrie, N.; Doubrivine, P.; Spakman, W.; Torsvik, T. (2012). "Greater India
India
Basin hypothesis and a two-stage Cenozoic
Cenozoic
collision between India
India
and Asia". Proceedings of the National Academy of Sciences. 109 (20): 7659–7664. Bibcode:2012PNAS..109.7659V. doi:10.1073/pnas.1117262109. PMC 3356651 . PMID 22547792.  ^ The lithospheric roots in South Africa, Australia, and Antarctica are 300 to 180 kilometres (190 to 110 mi) thick. (Kumar et al. 2007) See also Kumar et al. 2007, figure 1 ^ Meert, J.G.; Tamrat, Endale (2006). "Paleomagnetic evidence for a stationary Marion hotspot: Additional paleomagnetic data from Madagascar". Gondwana
Gondwana
Research. 10: 340–348. doi:10.1016/j.gr.2006.04.008.  ^ Schulte, Peter; et al. (5 March 2010). "The Chicxulub Asteroid Impact and Mass Extinction at the Cretaceous-Paleogene Boundary". Science. AAAS. 327 (5970): 1214–1218. Bibcode:2010Sci...327.1214S. doi:10.1126/science.1177265. ISSN 1095-9203. PMID 20203042. Retrieved 5 March 2010. 

References[edit]

Wikimedia Commons has media related to Indian tectonic plate.

Aitchison, Jonathan C.; Ali, Jason R.; Davis, Aileen M. (2007). "When and where did India
India
and Asia collide?". Journal of Geophysical Research. 112 (B5). Bibcode:2007JGRB..11205423A. doi:10.1029/2006JB004706. ISSN 0148-0227. Retrieved January 12, 2016.  Chen, Ji (January 4, 2005). "Magnitude 9.0 off W coast of northern Sumatra Sunday, December 26, 2004 at 00:58:49 UTC: Preliminary rupture model". U.S. Geological Survey. Archived from the original on March 5, 2005. Retrieved 28 December 2004.  Kind, Rainer (September 2007). "The fastest continent: India's truncated lithospheric roots". Helmholtz Association of German Research Centres. Retrieved January 2012.  Check date values in: access-date= (help) Kumar, Prakash; Yuan, Xiaohui; Kumar, M. Ravi; Kind, Rainer; Li, Xueqing; Chadha, R. K. (18 October 2007). "The rapid drift of the Indian tectonic plate". Nature. 449 (7164): 894–897. Bibcode:2007Natur.449..894K. doi:10.1038/nature06214. ISSN 0028-0836. PMID 17943128.  Scotese, Christopher R. (January 2001). "The collision of India
India
and Asia (90 mya — present)". Paleomap Project. Retrieved 28 December 2004. 

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Geography of India

Climate

Climate Climatic regions

Geology

Fossil Parks Geology of India Indian Plate Stones

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Indo-Gangetic Eastern Coastal Western Coastal

Regions

North India Northeast India East India South India West India Central India

Subdivisions

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Environment

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v t e

Geography of Sri Lanka

Climate

Climate Climatic regions

Dry Zone Wet Zone

Natural disasters

Geology

Indian Plate Gems Central Highlands Hanthana Mountain
Mountain
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Range

Extreme points

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Landforms

Beaches Islands Lagoons Lakes Mountains Rivers Valleys Waterfalls

Bordering entities

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Environment

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v t e

Tectonic plates

Major

African Indo-Australian Plate Antarctic Eurasian North American Pacific South American

Minor

Amurian Arabian Caribbean Caroline Cocos Juan de Fuca Nazca Okhotsk Philippine Scotia Somali Yangtze

Other

Adriatic Aegean Sea Anatolian Australian Balmoral Reef Banda Sea Bird's Head Burma Capricorn Conway Reef Easter Explorer Futuna Galapagos Gonâve Gorda Greenland Halmahera Iberian Indian Iranian Juan Fernández Kerguelen Kermadec Madagascar Manus Maoke Mariana Molucca Sea New Hebrides Niuafo’ou North Andes North Bismarck North Galapagos Nubian Okinawa Panama Pelso Philippine Mobile Belt Rivera Sangihe Seychelles Shetland Solomon Sea South Bismarck South Sandwich Sunda Timor Tisza Tonga Woodlark

Historical

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List of tectonic plates

v t e

Himalayan earthquakes

Notable Himalayan quakes

1505 Lo Mustang earthquake 1897 Assam 1934 Nepal–Bihar 1947 Assam 1950 Assam–Tibet 1988 Nepal 1991 Uttarkashi 1999 Chamoli 2005 Kashmir 2008 Damxung 2009 Bhutan 2011 Sikkim April 2015 Nepal May 2015 Nepal

Plate tectonics

Geology of the Himalayas Indian Plate Eurasian Plate Oldham Fault Himalayan Frontal Fault North Himalayan Normal Fault

Coordinates: 34°25′55″N 73°32′13″E / 34.43194°N 73.53694°E / 34.43194; 73.53694

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