Sea Floor Spreading And Subduction Animation

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.

Sea floor spreading and subduction animation.

The process of subduction and sea floor spreading can change the size and shape of the oceans. I didn t know it would come to this. The denser lithospheric material then melts back into the earth s mantle. 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.

Have you noticed lately that your students just aren t listening when you try to teac. Seafloor spreading is one of the two major processes of plate tectonics the other being subduction. This animation depicts a 100 000 year time span of seafloor spreading. Subduction happens where tectonic plates crash into each other instead of spreading apart.

A subduction zone is the entire area of subduction between the trench and the volcanic arc. Spreading rates determine if the ridge is fast intermediate or slow. Because of these processes the ocean floor is renewed about every 200 million years. It also shows the subduction of oceanic crust under continental crust and the resulting formation of magma and subsequent volcanism.

Seafloor spreading is the continuous process of forming new igneous rock at midocean ridges by injection of magma that forms new seafloor. Seafloor spreading and plate boundaries. I m sorry you somehow found this. At subduction zones the edge of the denser plate subducts or slides beneath the less dense one.

Spreading rate is the rate at which an ocean basin widens due to seafloor spreading. Trenches accretionary wedges prisms and volcanic or island arcs are key surface features produced by subduction. Seafloor spreading is just one part of plate tectonics. These age data also allow the rate of seafloor spreading to be determined and they show that rates.

It details the upwelling of magma at a midocean ridge along with associated transform faults.