deep sea trench
Overall their materials are of the same age, but the continental plates simply break or collide whereas the ocean-floor plates are in constant cycles of construction and destruction.
a deep-ocean trench is a portion of the earth crust
sea-floor spreading
The continental and oceanic plates are primarily igneous rock. The continental crust is granitic and the oceanic crust is basaltic.
Convergent plate boundaries can occur as a continental-continental, continental-oceanic, or oceanic-oceanic crust collision. A continental-continental collisions will typically result in a mountain range formation, such as the Himalayan Mountain Range. A continental-oceanic converging plate boundary will result in the more dense oceanic crust subducting beneath the less dense continental crust. The subduction zone leads to volcano formation from melting rock within the asthenosphere, beneath the continental crust. An example of this boundary is the west coast of the United States. An oceanic-oceanic converging plate boundary will typically result in one oceanic slab "sliding" beneath the other, due to only slight differences in density. This may form a volcanic island arc on the ocean floor, but may not necessarily reach above sea level.
Overall their materials are of the same age, but the continental plates simply break or collide whereas the ocean-floor plates are in constant cycles of construction and destruction.
Oceanic ridge
That is called subduction.
An oceanic trench is formed. Divergent boundaries pull away from each other, forming a cavern in the ocean floor. The Marianas Trench is a good example of a divergent boundary.
what other ocean floor feature is fromed by movement of earth's plates
a deep-ocean trench is a portion of the earth crust
sea-floor spreading
sea-floor spreading
what other ocean floor feature is fromed by movement of earth's plates
under water volcanoes move the oceanic plates and spread them
under water volcanoes move the oceanic plates and spread them
Sea floor spreading 2 oceanic plates coming apart