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He was a Dutch cartographer.
He was the first person able to identify the real shape of the Atlanric Ocean -
He published "La creation et ses mystere devoiles" with a picture showing South America and Africa combined
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He was a paleontologist. He was the scientist that first proposed in "The origin of continents and oceans" a comprhensive theory of continental drift.
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He understood that radiocativity decay was a huge source of heat in the Earth's interior, he supposed the presence of convective cells such engines of continental drift
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He was a sesmiologist who remarked that the distributions of volcanoes and earthquakes is correlated and that the deepest earthquakes always occour at continents edges, drawing and inclined flat surface.
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They coin the term seafloor spreading
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He develops two concept crucial to the plate tectonic theory: hot spots and transform faults
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