Sea Floor Spreading And Subduction Video

These age data also allow the rate of seafloor spreading to be determined and they show that rates.

Sea floor spreading and subduction video.

I didn t know it would come to this. Spreading rate is the rate at which an ocean basin widens due to seafloor spreading. Describe the process of subduction. The processes of subduction and sea floor spreading can change the size and shape of the oceans.

The rate at which new oceanic lithosphere is added to each tectonic plate on either side of a mid ocean ridge is the spreading half rate and is equal to half of the spreading rate. Seafloor spreading is just one part of plate tectonics. The denser lithospheric material then melts back into the earth s mantle. Seafloor spreading theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them.

They both are subduction zones but one is in the pacific plate and the other is in the north american plate. The interpretation of data results can lead to many conclusions. Spreading rates determine if the ridge is fast intermediate or slow. That is the time it takes for new rock to form at the mid ocean ridge move across the ocean and sink into a trench.

I m sorry you somehow found this. List and describe the three pieces of evidence found to support sea floor spreading. Sea floor spreading where new material appears at seams on the sea floor and seems to have moved and is moving to. Have you noticed lately that your students just aren t listening when you try to teac.

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 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. Is it sea floor spreading and tectonic plate subduction as the theory of geology suggests or is it growing earth evidence. Depending on the theory used to interpret them or what you were actually looking for.

Because of these processes the ocean floor is renewed about every 200 million years. Compare and contrast subduction in the pacific ocean and the atlantic ocean.