Seafloor Spreading Theory Given By

Sea floor spreading theory.

Seafloor spreading theory given by. As per seafloor spreading theory the mid oceanic ridge is the region where at the crest of oceanic ridges through the rupture of the oceanic crust and the crack continuous new lava eruption thrusts into it consequently pushing the oceanic crust on either side. Supporters of continental drift originally theorized that the continents moved drifted through unmoving oceans. Seafloor spreading theory that oceanic crust forms along submarine mountain zones known collectively as the mid ocean ridge system and spreads out laterally away from them. Hess its major tenets gave great support to the theory of continental drift continental drift geological theory that the relative positions of the continents on the earth s surface have.

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. Seafloor spreading proves that the ocean itself is a site of tectonic activity. In 1912 when alfred wegener proposed that the continents had once been joined together and had split apart the biggest weakness in his hypothesis was the. When the concept of seafloor spreading came along scientists recognized that it was the mechanism to explain how continents could move around earth s surface.

Seafloor spreading helps to explain continental drift in the theory of plate tectonics. Like the scientists before us we will now merge the ideas of continental drift and seafloor spreading into the theory of plate tectonics. That is it explains why the age thickness and density of the oceanic crust increases with distance from the mid oceanic ridge. The theory of sea floor spreading states that new oceanic crust is being formed continuously at mid oceanic ridges while the older rocks move away from the ridge.

The motivating force for seafloor spreading ridges is tectonic plate slab pull at subduction zones rather than magma pressure although there is typically. 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 disproves an early part of the theory of continental drift. Seafloor spreading was proposed by an american geophysicist harry h.

Seafloor spreading theory of lithospheric evolution that holds that the ocean floors are spreading outward from vast underwater ridges. These age data also allow the rate of seafloor spreading to be determined and they show that rates. First proposed in the early 1960s by the american geologist harry h.