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The key principle of plate tectonics is that the lithosphere exists as separate and distinct tectonic plates, which ride on the fluid-like solid the asthenosphere. Plate motions range from 10 to 40 millimetres per year (0.4 to 1.6 in/year) at the Mid-Atlantic Ridge (about as fast as fingernails grow), to about 160 millimetres per year (6.3 in ...
Obduction zones occurs when the continental plate is pushed under the oceanic plate, but this is unusual as the relative densities of the tectonic plates favours subduction of the oceanic plate. This causes the oceanic plate to buckle and usually results in a new mid-ocean ridge forming and turning the obduction into subduction. [citation needed]
Lithospheric processes which operate across mountain belts include those related to the theory of plate tectonics (e.g. tectonic plate convergence, folding, faulting, exhumation). Interaction of the asthenosphere, lithosphere and surface through the mantle process of flat-slab subduction .
Plate tectonics (from Latin tectonicus, from Ancient Greek τεκτονικός (tektonikós) 'pertaining to building') is the scientific theory that Earth's lithosphere comprises a number of large tectonic plates, which have been slowly moving since 3–4 billion years ago.
The Antarctic plate is a tectonic plate containing the continent of Antarctica, the Kerguelen Plateau, and some remote islands in the Southern Ocean and other surrounding oceans. After breakup from Gondwana (the southern part of the supercontinent Pangea ), the Antarctic plate began moving the continent of Antarctica south to its present ...
Movements of tectonic plates create volcanoes along the plate boundaries, which erupt and form mountains. A volcanic arc system is a series of volcanoes that form near a subduction zone where the crust of a sinking oceanic plate melts and drags water down with the subducting crust. [9] The Dome of Vitosha mountain next to Sofia
The Australian plate then to the south starts subducting under the Pacific plate at a rate of 3.6 cm/year (1.4 in/year) at the Puysegur Trench, [6] which ends in the south as a long series of transform faults between the two plates called the Macquarie Ridge Complex, commencing with the McDougall Fault Zone and ending with the Macquarie Fault ...
The Insular plate collides with the Pacific Northwest. The remnants of that terrane comprise the Insular Belt today, of which Vancouver Island is a part. 90 Ma Cretaceous Third and last wave of plutons added to Sierra batholith. 51 Ma Eocene: The Siletzia plate collides with the Pacific Northwest, forming the coast of much of Washington and ...
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