Plate Tectonics

Plate Tectonics

1. Alfred Wegner

   • He proposed that every continent was once a part of a super continent. This theory is known as the continental drift

2. Harry Hess

   • He proposed seafloor spreading in 1960. He was a geologist and was in the Navy during the war.

3. Seafloor Spreading

   • This is a theory that was proposed in 1960 and stated that the movement of the continents was a result of sea floor spreading. It was possible that molten magma from beneath the Earths crust could ooze up between the plates in the Great Global Rift.

4. Plate Tectonics

   • The theory of tectonic plates states that the Earths solid outer core and the lithosphere are separated into plates that move over the asthenosphere

5. Hot spots are the emergence of magma and the formation of volcanoes at areas away from plate boundaries. Example Hawaii

   • Hot Spots

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