Sea Floor Spreading And Subduction Diagram

Seafloor spreading is just one part of plate tectonics.

Sea floor spreading and subduction diagram.

At subduction zones the edge of the denser plate subducts or slides beneath the less dense one. 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. Spreading rate is the rate at which an ocean basin widens due to seafloor spreading. These age data also allow the rate of seafloor spreading to be determined and they show that rates.

Subduction happens where tectonic plates crash into each other instead of spreading apart. Subduction and sea floor spreading are processes that could alter the size and form of the ocean. Ocean large bodies of water sitting atop oceanic crust. 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.

Oceanic crust thin parts of the earth s crust located under the oceans. For instance the atlantic ocean is believed to be expanding because of its few trenches. 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. Spreading rates determine if the ridge is fast intermediate or slow.

Regions where this process occurs are known as subduction zones rates of subduction are typically measured in centimeters per year with the average rate of convergence being. Seafloor spreading theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them. The denser lithospheric material then melts back into the earth s mantle. Subduction zone the area in which one part of the earth s crust a plate is pushed underneath another plate as the two plates collide.

Subduction is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink due to high gravitational potential energy into the mantle. The purpose of this activity is to make a simple model that shows the evolution of oceanic crust through sea floor spreading and subduction. In seafloor spreading magma moves from the asthenosphere to the crust.