Plate Movements Plate Boundaries And Sea Floor Spreading Model

Seafloor spreading at mid ocean ridges.

Plate movements plate boundaries and sea floor spreading model.

Seafloor spreading is just one part of plate tectonics. Along the third type of plate boundary two plates move laterally and pass each other along giant fractures in earth s crust. Hot magma rises to the. Plate tectonics plate tectonics seafloor spreading.

The movements of these plates. 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. Subduction happens where tectonic plates crash into each other instead of spreading apart. Pertaining to building is a scientific theory describing the large scale motion of seven large plates and the movements of a larger number of smaller plates of earth s lithosphere since tectonic processes began on earth between 3 3 and 3 5 billion years ago.

Makes most of the earth s earthquakes and volcanoes. These convergent boundaries also occur where a plate of ocean dives in a process called subduction under a landmass. Plate tectonics plate tectonics transform faults. Plate tectonics from the late latin.

Tectonicus from the ancient greek. Transform faults are so named because they are linked to other types of plate boundaries. At subduction zones the edge of the denser plate subducts or slides beneath the less dense one. These age data also allow the rate of seafloor spreading to be.

In chapter 2 you learned about plate tectonics the well proven concept that the earth s surface is split up into several dozen moving plates of rock. A process called sea floor spreading. The impact of the colliding plates can cause the edges of one or both plates to buckle up into a mountain ranges or one of the plates may bend down into a deep seafloor trench. As the overlying plate lifts up it also forms mountain ranges.

In places where convection currents rise up towards the crust s surface tectonic plates move away from each other in a process known as seafloor spreading fig. Convection currents drive the movement of earth s rigid tectonic plates in the planet s fluid molten mantle. A chain of volcanoes often forms parallel to convergent plate boundaries and powerful earthquakes are common along these boundaries. The denser lithospheric material then melts back into the earth s mantle.

Plate tectonics and the ocean floor. The majority of transform faults link the offset segments of oceanic ridges.