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The continental crust on the downgoing plate is deeply subducted as part of the downgoing plate during collision, defined as buoyant crust entering a subduction zone. An unknown proportion of subducted continental crust returns to the surface as ultra-high pressure (UHP) metamorphic terranes, which contain metamorphic coesite and/or diamond plus or minus unusual silicon-rich garnets and/or ...
Such laterally propagating tears have been recognised from several collision zones, such as the Hindu Kush part of the Himalayan Belt. [6] The Tertiary magmatism in the Alps observed along the Insubric Line has been argued to result from a rapidly propagating slab tear following continental collision and the initiation of slab breakoff. [7]
The North India Orogen was created during the continental collision. [49] This collision is believed to be the driver for the intracontinental deformation in the South China Block. [49] The collision history is constrained by sedimentary provenance study. [49] The Ediacaran-Cambrian sedimentary rocks in the Cathaysia Block showed an exotic ...
The North China Craton is a continental crustal block with one of Earth's most complete and complex records of igneous, sedimentary and metamorphic processes. [1] It is located in northeast China, Inner Mongolia , the Yellow Sea , and North Korea . [ 1 ]
A decade later this continental collision was named the East African Orogeny, but it was also realised that this was not the simple bringing together of two halves. Rather, it was the piecemeal assembly of several much smaller cratonic elements that once formed an earlier supercontinent (today known as Rodinia ), a process that eventually ...
The Wilson cycle theory is based upon the idea of an ongoing cycle of ocean closure, continental collision, and a formation of new ocean on the former suture zone.The Wilson Cycle can be described in six phases of tectonic plate motion: the separation of a continent (continental rift), formation of a young ocean at the seafloor, formation of ocean basins during continental drift, initiation of ...
[5] [6] After the Taconic orogeny, a collision with Africa (the Alleghanian orogeny) created the supercontinent Pangaea, which was later split by the rifting process that created the Atlantic Ocean, the Newark Basin, and the Palisades. The material in Cameron's Line is described as "highly laminated, migmatized, complexly folded and annealed ...
Cratons of South America and Africa during the Triassic Period when the two continents were joined as part of the Pangea supercontinent. A craton (/ ˈ k r eɪ t ɒ n / KRAYT-on, / ˈ k r æ t ɒ n / KRAT-on, or / ˈ k r eɪ t ən / KRAY-tən; [1] [2] [3] from Ancient Greek: κράτος kratos "strength") is an old and stable part of the continental lithosphere, which consists of Earth's two ...