mid ocean ridge
mid ocean ridge
Subduction
it formed by one plate sliding under another
The island-arc volcanoes are formed from the subduction of an oceanic tectonic plate under another tectonic plate, and often parallel an oceanic trench.
When a plate is subducted under another the geological feature depends what type of plate boundary it is. If it is two oceanic plates then the subduction causes Island Arcs to be formed as well as a trenches. When a oceanic plate is subducted under a continental plate then a trench is again formed just off the shore of the continental plate and fold mountains are created as the continental plate is forced upwards and the friction melts the oceanic plate into magma which then rises (as it is less dense than surrounding magma) and forms volcanos.
trenches
In geology a trench is formed where one tectonic plate is subducted or forced under another plate.
Subduction Zone
mid ocean ridge
Usually when it meets another tectonic plate at a convergent plate boundary. If the oceanic plate converges with a continental plate the denser oceanic plate will be forced under the continental plate. If it converges with another oceanic plate the older (and therefore cooler and denser) plate will be forced under the younger plate.
one plate is moving under another plate
Subduction
A volcano is most often formed whon one tectonic plate moves under another
Mt. Everest is a fold mountain.Related Information:A fold mountain is formed when one plate subducts (slides under another). The subducted plate is forced down and, ultimately, is incorporated in Earth's magma. the other is forced upwards and bends, then folds.
it formed by one plate sliding under another
The Mariana trench is the deepest part of the ocean in the world. It was formed by the subduction of the Pacific plate being forced under the Mariana plate.
The Marianas (or Mariana) Trench is formed by the subduction of the Pacific Plate as it is forced under the smaller Mariana Plate at the bottom of the ocean between Japan and New Guinea.