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He was the first scientist to think that continents were once joined together before they drifted into their current position.
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He was the first scientist to come up with the idea that that plate tectonics actually moved the continents into their current positions.
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He was the person to believe that the Earth had implications of mantle convection, which have the crust above it move. He also came up with the idea that rocks had ages.
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He suggested another reason that continental drift did once actually happen. He said that magma created new layers which caused the seafloor to spread.
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He helped give more evidence to the theory of continental drift. He looked at the magnetic seafloor stripes in the ocean. There were symmetrical patterns in the seafloor.
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He helped give more evidence to the theory of continental drift. He looked at the magnetic seafloor stripes in the ocean. There were found to be symmetrical patterns in the seafloor.
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He helped give more evidence to the continental drift theory. He looked at the magnetic seafloor stripes in the ocean, and found that the patterns were symmetrical.
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He presented that the tectonic plates might move over fixed hotspots in the mantle, forming volcanic island chains like Hawaii. He also created the thought of transform faults (such as the San Andreas Fault)