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The Tethys Himalaya is an approximately 100-km-wide synclinorium formed by strongly folded and imbricated, weakly metamorphosed sedimentary series. Several nappes, termed the "North Himalayan Nappes", [18] have also been described within this unit.
The Himalayas, or Himalaya (/ ˌ h ɪ m ə ˈ l eɪ. ə, h ɪ ˈ m ɑː l ə j ə / HIM-ə-LAY-ə, hih-MAH-lə-yə) [b] is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has several peaks exceeding an elevation of 8,000 m (26,000 ft) including Mount Everest, the highest mountain on ...
The Lesser Himalayan Sequence is a unit emplaced before the mountain-building processes. [3] The Greater Himalayan Crystalline complex represents a high-grade unit moved towards SW from the hinterland. The Tethyan Himalayan Sequence represents strata deposited in the former passive margin in the Northern edge of Indian plate. [11] [12]
Due to plate tectonics, Insular India, situated over the Indian plate, split from Madagascar and collided (c. 55 Mya) with the Eurasian plate, resulting in the formation of the Himalayas. Until roughly 140 million years ago , the Indian plate formed part of the supercontinent , Gondwana , together with modern Africa, Australia, Antarctica, and ...
the Greater Himalayan Crystalline complex, which is mainly composed by high-grade gneiss and migmatite, fringed below by the Main Central Thrust and the South Tibetan Detachment; and; the Tethyan Himalayan Sequence, mainly composed by Proterozoic to Eocene sediments, deformed in a Paleogene fold-thrust belt, fringed below by the South Tibetan ...
Mountain formation occurs due to a variety of geological processes associated with large-scale movements of the Earth's crust (tectonic plates). [1] Folding , faulting , volcanic activity , igneous intrusion and metamorphism can all be parts of the orogenic process of mountain building. [ 2 ]
One of the major depositional strata in the Himalaya is the Lesser Himalayan Strata from the Paleozoic to Mesozoic eras. It had a quite different marine succession during the Paleozoic, as most parts of it are sparsely fossiliferous or even devoid of any well-defined fossils.
Satellite image of the Himalayas Spatial arrangement of the Himalayan tectonostratigraphic zones. Modified from N.R. McKenzie et al 2011 [1]. Pre-collisional Himalaya is the arrangement of the Himalayan rock units before mountain-building processes resulted in the collision of Asia and India.