public marks

PUBLIC MARKS from shankargallery with tags research & animation

25 January 2007 16:45

Plate tectonics animations

These animations were originally produced for the US Geological Survey video Secrets in Stone. They have been converted to animated gifs for web display. You may use these animations for any educational purpose, we simply request that you cite the US Geol

A Science Odyssey: You Try It: Plate Tectonics

Even though the theory of continental drift was proposed in 1912 by Alfred Wegener, the idea of moving continents wasn't generally accepted until the early 1960s. That's when Wegener's theory was resurrected by Harry Hess, Robert Dietz, Fred Vine, and Dru