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He came up with continetal drift by fitting to gether the contienets
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Publicly announces theory of continental drif with evidence of fossils lining up from a super contienet he called pangea. His theory sadly got rejected.
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Investigated the sea floor ridges and the sea floor spreading
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Gathers further evidence in continetal drift but can still not justify what causes it.
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Has the heory that the mantle moves and cauces continetal drift
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Continues to support his theory of the sea floor spreading finds flat topped mountains under water he calls 'guyots'.
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He finally puts all the theory's together and creates the modern day continental drift theory.