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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 ...
From about c. 1190–980 Ma (the actual timing varies by locality) two separate continental blocks collided with Laurentia. Both of these collision events are thought to be analogous to the collision driving modern-day growth of the Himalaya range.
Subduction of an oceanic plate beneath a continental plate to form an accretionary orogen (example: the Andes) Continental collision of two continental plates to form a collisional orogen. Typically, continental crust is subducted to lithospheric depths for blueschist to eclogite facies metamorphism, and then exhumed along the same subduction ...
The Alleghanian orogeny, a result of three separate continental collisions. USGS. The immense region involved in the continental collision, the vast temporal length of the orogeny, and the thickness of the pile of sediments and igneous rocks known to have been involved are evidence that at the peak of the mountain-building process, the Appalachians likely once reached elevations similar to ...
In the late Cretaceous the first continental collision took place as the northern part of the Adriatic subplate collided with Europe. This is called the Eo-Alpine phase, and is sometimes regarded as the first phase of the formation of the Alps. The part of the Adriatic plate that was deformed in this phase is the material that would later form ...
The synchronous collision hypothesis limits the age of collision onset at 59 Ma by dating the oldest turbidites formed on the passive margin of the India continent, [19] which indicates the incoming of materials from the active Asian continental margin. Geological evidence of rocks younger than 59 Ma and deposited on top of the turbidite ...
[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 ...
The Caledonian Wilson cycle commenced with the continental break-up of Rodinia [17] and the opening of the Iapetus ocean about 616–583 Ma ago. [18] [19] [20] The Iapetus was at its widest in the Late Cambrian–Early Ordovician [21] [1] before it began to close by subduction of Iapetus crust along the Gondawanan and Laurentian margins starting between 500 and 488 Ma ago.