In Sea Floor Spreading Pieces Of Oceanic Crust

On the other hand unlike puzzle pieces some plates are being pushed underneath other plates usually oceanic under continental and new crust is being formed at spreading rifts.

In sea floor spreading pieces of oceanic crust.

Move sideways against each other along a transform plate boundary. In sea floor spreading pieces of oceanic crust. The formation of the new crust is due to the rising of the molten material magma from the mantle by convection current. Move down in a subduction zone.

Move apart along a divergent plate boundary. The mid ocean ridge is the region where new oceanic crust is created. This idea played a pivotal role in the development of the theory of plate tectonics which revolutionized geologic thought during the last quarter of the 20th century. Age of oceanic lithosphere.

The process of 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. These age data also allow the rate of seafloor spreading to be determined and they show that rates. The oceanic crust is composed of rocks that move away from the ridge as new crust is being formed.

The magnetism of mid ocean ridges helped scientists first identify the process of seafloor spreading in the early 20th century. The second piece of evidence in support of continental drift came during the late 1950s and early 60s from data on the bathymetry of the deep ocean floors and the nature of the oceanic crust such as magnetic properties and more generally with the development of marine geology which gave evidence for the association of seafloor spreading along. Youngest red is along spreading centers. Move together along a convergent plate boundary.