In 1912, German meteorologist Alfred Wegener published The Origin of Continents and Oceans, in which he proposed the world’s continents had once been joined in a single landmass that he named Pangaea. Wegener grounded his argument in the agreeable shape of continental coastlines, which look like puzzle pieces asking to be fit back together, and unlikely deposits in the fossil record of similar plants and animals separated by oceans too vast to swim.
Wegener’s proposal was visually intuitive and supported by a body of physical evidence, and it should have found a home among professional geologists at the time, but they rejected the idea and abandoned it for five decades. Wegener was a meteorologist, after all. Geologists didn’t consider him part of their family.
Wegener raised the single continent theory in the public mind and named it, but the idea was not his. It was the brainchild of Frank Taylor, an amateur geologist in the United States. Continental geologists might have considered Taylor a distant cousin at the time.
Neither Wegener nor Taylor could say what caused the single landmass to break apart and send the continents traveling in opposite directions. That task fell to British geologist, Arthur Holmes, who in 1944 was wise to the currents of heat and rock being exchanged underground and imaginative enough to speculate that continents move about because heated plates of rock are pushing and shoving against each other below the surface.
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