Unformatted text preview: moves. The continental plates are separated by such cracks or plate margins. When the pressure escapes through these margins, it causes the continental plate to shift away from each other. Harry Hess, a geologist and a United States Navy officer in World War II, was considered one of the founders to the theory of plate tectonics. Hess introduced the theory that the Earth’s crust moved away from long volcanic ridges, also known today as the Sea floor spreading. Hess helped established Alfred Wegener’s theory of continental drift. Wegener, a German scientist believed that after studying the different large landmasses the Earth fit together like a puzzle. By studying rock types, geological structures and fossils, he was able to determine the similarities on each continent....
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- Spring '10
- Plate Tectonics, Plate Tectonics Theory, Land formation