Continental drift Permian era but failing to account for glaciation in India, Australia and South Africa. Geophysicist Jack Oliver is credited with providing seismologic evidence supporting plate tectonics which encompassed and superseded continental drift with the article "Seismology and the New Global Tectonics", published in 1968, using data collected from seismologic stations, including those he set up in the South Pacific. It is now known that there are two kinds of crust: continental crust and oceanic crust. Continental crust is inherently lighter and its composition is different from oceanic crust, but both kinds reside above a much deeper "plastic" mantle. Oceanic crust
Ice Age: Continental Drift accompanied by the short animated film "The Longest Daycare" featuring Maggie Simpson. As a promotion for "Ice Age: Continental Drift", Fox released two 3-minute short segments from the film, titled "Scrat's Continental Crack-up" and "Scrat's Continental Crack-up: Part 2". The first part premiered as a theatrical release attached to "Gulliver's Travels" in 2010, and it was released on-line on January 6, 2011, on iTunes Movie Trailers. The second part was released on November 16, 2011, on iTunes, and debuted in theatres with "". The first part shows how the Scrat's actions lead to split of the continents, while in the