Sea Floor Spreading Occurred After Earth Plates Met

The reason we have plate tectonics is because of a viscous partially molten liquid mantel or asthenosphere which lies just beneath the solid crust or lithosphere. Seafloor spreading over the past 100 to 200 million years has caused the atlantic ocean to grow from a tiny inlet of water between the continents of europe africa and the americas into the vast ocean that exists today. East africa may be the site of the earth s next major ocean.

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Continents don t drift independently.

Sea floor spreading occurred after earth plates met. Since many plates such as the north american plate include continental portions attached to oceanic portions seafloor spreading also the direction in which continents move. 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. Seafloor spreading determines plate motion around a midocean ridge. These age data also allow the rate of seafloor spreading to be.

The mid ocean ridge is where the seafloor spreading occurs in which tectonic plates large slabs of earth s lithosphere split apart from each other. Spreading rate is the rate at which an ocean basin widens due to seafloor spreading. Plate interactions in the region provide scientists an. Seafloor spreading is plate tectonics.

Spreading rates determine if the ridge is fast intermediate or slow. 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. Convection currents within the mantle take the continents on a conveyor belt ride of oceanic crust that over millions of years takes them around the planet s surface. Seafloor spreading occurs along mid ocean ridges large mountain ranges rising from the ocean floor.

Seafloor spreading theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them. Plate tectonics may seem like a relatively simple topic but can actually be very complex when taking into account all of the aspects of liquid and solid earth. 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. As upwelling of magma continues the plates continue to diverge a process known as seafloor spreading.

By the use of the sonar hess was able to map the ocean floor and discovered the mid atlantic ridge mid. Seafloor spreading is the mechanism for wegener s drifting continents. Midocean ridges are always plate boundaries. Plate tectonics plate tectonics seafloor spreading.

The mid atlantic ridge for instance separates the north american plate from the eurasian plate and the south american plate from the african plate the east pacific rise is a mid ocean ridge that runs through the eastern pacific ocean and separates the pacific plate from the north american. Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube. Seafloor spreading was proposed by an american geophysicist harry h.