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The evidence that supports plate tectonics is continental drift and sea floor spreading. Continental drift was discovered by Alfred Wegener in 1915. He discovered a super continent he called Pangaea. Although many people said that the continents looked like they fit together, he was the first to supply evidence. Many people did not believe his theory and ignored it for at least 40 years. Sea floor spreading has discovered by Harry Hess during World War 2. He was a navy ship commander. He was watching for German Submarines when he saw an underwater mountain range, called the Mid Atlantic ridge.

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13y ago

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