Difference Between Subduction And Sea Floor Spreading

Subduction happens where tectonic plates crash into each other instead of spreading apart.

Difference between subduction and sea floor spreading.

The area is a subduction zone. Subduction is when one tectonic plate moves under another tectonic plate. At subduction zones the edge of the denser plate subducts or slides beneath the less dense one. Sea floor spreading is caused by a ridge expansion zone opening in the earths crust where new magma lava rises up and adds to the sea floor.

It happens on both sides of the ridg. Tuzo wilson combined the continental drift and seafloor spreading hypotheses to propose the theory of plate tectonics. These age data also allow the rate of seafloor spreading to be determined and they show that rates. The denser lithospheric material then melts back into the earth s mantle.

Sea floor spreading is where new oceanic crust is formed through volcanic activity and then moves away from the ridge. New sea floor is created by the upwelling of magma at mid ocean spreading centers. In a convection current the cooler material sinks back down. As each new centimeter is added and cools another takes its place.

The area is a subduction zone. In a convection current the hot material rises to the surface when the material reaches the surface it starts to cool off and spread out. Old ocean floor is destroyed by subduction at deep sea trenches. Seafloor spreading is just one part of plate tectonics.

As upwelling of magma continues the plates continue to diverge a process known as seafloor spreading samples collected from the ocean floor show that the age of oceanic crust increases with distance from the spreading centre important evidence in favour of this process. New sea floor is created by the upwelling of magma at mid ocean spreading centers. Old ocean floor is destroyed by subduction at deep sea trenches. This causes the sea floor spreading observed at the mid ocean ridges.

In 1965 a canadian geophysicist j. Subduction is when there is a convergent plate boundary and one of plates subducts below the other one. Sea floor spreading occurs at a divergent plate boundary in the ocean of course here the two plates are moving away from each other and lava is able to escape from the mantle creating new geologic features.