Harry Hess of Princeton revived Wegener's ideas. . . . In 1962 he published what he called an 'essay in geopoetry', written two years earlier. It proposed that heat churning through the Earth's mantle might be responsible for the movement of the plates.
Alexandra Witze & Jeff Kanipe, Island on Fire: The Extraordinary Story of a Forgotten Volcano That Changed the World (New York: Island Books, 2015), ch. 2, Kindle loc 454