Sea Floor Spreading And Subduction Video

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.

Sea floor spreading and subduction video. 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. They both are subduction zones but one is in the pacific plate and the other is in the north american plate. These age data also allow the rate of seafloor spreading to be determined and they show that rates.

This report describes how to build a model of the outer 300 km 180 miles of the earth that can be used to develop a better understanding of the principal features of plate tectonics including sea floor spreading the pattern of magnetic stripes frozen into the sea floor transform faulting thrust faulting subduction and volcanism. Seafloor spreading theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them. Compare and contrast subduction in the pacific ocean and the atlantic ocean. Because of these processes the ocean floor is renewed about every 200 million years.

List and describe the three pieces of evidence found to support sea floor spreading. Seafloor spreading is just one part of plate tectonics. Spreading rates determine if the ridge is fast intermediate or slow. The processes of subduction and sea floor spreading can change the size and shape of the oceans.

Spreading rate is the rate at which an ocean basin widens due to seafloor spreading. Describe the process of subduction. At subduction zones the edge of the denser plate subducts or slides beneath the less dense one. Have you noticed lately that your students just aren t listening when you try to teac.

I didn t know it would come to this. Subduction happens where tectonic plates crash into each other instead of spreading apart. The interpretation of data results can lead to many conclusions. 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.

The denser lithospheric material then melts back into the earth s mantle. 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.