Basalt the once molten rock that makes up most new oceanic crust is a fairly magnetic substance and scientists began using magnetometers to measure the magnetism of the ocean floor in the 1950s what they discovered was that the magnetism of the ocean floor around.
Sea floor spreading real world examples.
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The magnetism of mid ocean ridges helped scientists first identify the process of seafloor spreading in the early 20th century.
For instance the atlantic ocean is believed to be expanding because of its few trenches.
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 definition a process in which new ocean floor is created as molten material from the earth s mantle rises in margins between plates or ridges and spreads out.
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.
Seafloor spreading theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them.
Seafloor spreading real life examples.
The differences in spreading rates affect not only the geometries of the ridges but also the geochemistry of the basalts that are produced.