Hypothesized Sea Floor Spreading Was

2 magnetic stripes the molten rock contains iron it is magnetic.

Hypothesized sea floor spreading was.

Enumerate and explain the evidences that support the sea floor spreading process. 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. Sea floor spreading enumerate and explain the initial and unusual observations that led to the formulation of the sea floor spreading hypothesis. Topic objectives for groupreporters c.

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. Mountains formed in part by volcanic activity caused by the subduction of oceanic lithosphere beneath a continent. As it cools the iron bits inside line up in the direction of the earth s magnetic poles.

A surface feature in the seafloor produced by the descending plate during subduction. Once the rock is hardened completely it locks the iron bits in place giving the ocean floor a pattern of magnetic stripes. The oceanic crust is composed of rocks that move away from the ridge as new crust is being formed. The mid ocean ridge is the region where new oceanic crust is created.

Differentiate continental crust from oceanic crust and explain why the continental crust is older than the. 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. The process of sea floor spreading.