Sea floor spreading and subduction work together.
Sea floor subduction.
Subduction and sea floor spreading are processes that could alter the size and form of the ocean.
These age data also allow the rate of seafloor spreading to be.
At subduction zones the edge of the denser plate subducts or slides beneath the less dense one.
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.
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.
Plate tectonics plate tectonics seafloor spreading.
As upwelling of magma continues the plates continue to diverge a process known as seafloor spreading.
The denser lithospheric material then melts back into the earth s mantle.
However not all subduction zone earthquakes will cause tsunamis.
The process of subduction.
For earthquakes larger than a magnitude 7 5 this can cause a tsunami a giant sea wave by suddenly moving the seafloor.
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.
Subduction in the form of gravitational slab pull is thought to be the largest force driving plate tectonics.
The process by which ocean floor sinks beneath a deep ocean trench and back into the mantle is called subduction sub duk shun.
Subduction happens where tectonic plates crash into each other instead of spreading apart.
Plates that are not subducting are driven by gravity sliding off the elevated mid ocean ridges a process called ridge push.
A descending plate is usually referred to as a slab where very old seafloor is being subducted the slab falls almost straight down and where younger plates are being subducted the slab descends at a shallow angle.
For instance the atlantic ocean is believed to be expanding because of its few trenches.
Due to this continuous seafloor spreading occurs and makes atlantic ocean floor to be connected to other continental crust making the ocean gets wider over the time.
The motivating force for seafloor spreading ridges is tectonic plate slab pull at subduction zones rather than magma pressure although there is typically significant magma activity at spreading ridges.
