Sea Floor Spreading And Subduction Animation

It also shows the subduction of oceanic crust under continental crust and the resulting formation of magma and subsequent volcanism.

Sea floor spreading and subduction animation.

These age data also allow the rate of seafloor spreading to be determined and they show that rates. Spreading rates determine if the ridge is fast intermediate or slow. I m sorry you somehow found this. Subduction is one of the two major processes of plate tectonics the other being seafloor spreading.

The process of subduction and sea floor spreading can change the size and shape of the oceans. A subduction zone is the entire area of subduction between the trench and the volcanic arc. Seafloor spreading is just one part of plate tectonics. Seafloor spreading is the continuous process of forming new igneous rock at midocean ridges by injection of magma that forms new seafloor.

Trenches accretionary wedges prisms and volcanic or island arcs are key surface features produced by subduction. Seafloor spreading and plate boundaries. The denser lithospheric material then melts back into the earth s mantle. Have you noticed lately that your students just aren t listening when you try to teac.

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. Spreading rate is the rate at which an ocean basin widens due to seafloor spreading. It details the upwelling of magma at a midocean ridge along with associated transform faults.

That is the time it takes for new rock to form at the mid ocean ridge move atoss the ocean and sink into a trench. 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. I didn t know it would come to this. Seafloor spreading is one of the two major processes of plate tectonics the other being subduction.

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.