underthrust

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underthrust

(ˈʌndəˌθrʌst)
n
(Geological Science) geology a reverse fault in which the rocks on the lower surface of a fault plane have moved under the relatively static rocks on the upper surface. Compare overthrust
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The earthquake had ruptured a 120-km by 80-km patch of the Main Himalayan Thrust (MHT), the detachment that separates the underthrusting Indian plate from the overriding Himalayan orogeny.
Li, "Possible location for underthrusting front of the Indus continent: constraints from helium isotope of the geothermal gas in southern Tibet and eastern Tibet," Acta Geologica Sinica, vol.
430 Ma collision of Ganderia and composite Laurentia, and/or underthrusting of Ganderias trailing edge by the leading edge of Avalonia, which (a) generated mixed arc and within-plate-type melts above the dehydrating slab, and (b) trapped pockets of asthenospheric mantle against the base of the crust, leading to large-scale crustal melting (van Staal et al.
(1976): Underthrusting and Quaternary faulting in northern Central America.
This convergence is largely accommodated by the underthrusting of one continental block beneath the other (Molnar and Tapponnier, 1975).
Northward underthrusting of India beneath Eurasia generates numerous earthquakes and consequently makes this area one of the most seismically hazardous regions on Earth.
In the early 1990s, deep reflection profiling was successfully carried out in the southern Tibetan plateau by the INDEPTH project, imaging the Main Himalaya Thrust which marks the underthrusting of the Indian plate beneath Himalaya.
Seismotectonics of the Himalayan collision zone :Geometry of the underthrusting Indian plate beneath the Himalaya, J.
A large number of events occur along the Caribbean-North American plate boundary, which dips to the west away from the underthrusting oceanic plate.
A small remnant plate called the Juan de Fuca plate is underthrusting the west coast of the Pacific northwest, producing a subduction zone like that along Sumatra.
Molnar, Peter (1990) A review of the seismicity and the rates of active underthrusting and deformation at the Himalaya.