Difference Between Subduction And Sea Floor Spreading

It happens on both sides of the ridg.

Difference between subduction and sea floor spreading.

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. This causes the sea floor spreading observed at the mid ocean ridges. At subduction zones the edge of the denser plate subducts or slides beneath the less dense one. These age data also allow the rate of seafloor spreading to be determined and they show that rates.

Sea floor spreading is where new oceanic crust is formed through volcanic activity and then moves away from the ridge. 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. Tuzo wilson combined the continental drift and seafloor spreading hypotheses to propose the theory of plate tectonics. Subduction is when one tectonic plate moves under another tectonic plate.

Old ocean floor is destroyed by subduction at deep sea trenches. Old ocean floor is destroyed by subduction at deep sea trenches. New sea floor is created by the upwelling of magma at mid ocean spreading centers. The area is a subduction zone.

The area is a subduction zone. The cooler denser mantle sinks causing subduction and the hotter mantle rises to the surface causing sea floor spreading. As each new centimeter is added and cools another takes its place. In a convection current the cooler material sinks back down.

Tuzo said that earth s crust or lithosphere was divided into large rigid pieces called plates. The denser lithospheric material then melts back into the earth s mantle. New sea floor is created by the upwelling of magma at mid ocean spreading centers. Subduction happens where tectonic plates crash into each other instead of spreading apart.

Seafloor spreading is just one part of plate tectonics. Subduction is when there is a convergent plate boundary and one of plates subducts below the other one. In 1965 a canadian geophysicist j.