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Jack Oliver is credited with providing seismologic evidence supporting plate tectonics which encompassed and superseded continental drift with the article "Seismology and the New Global Tectonics", published in 1968, using data collected from seismologic stations, including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 heat. The first details of the sequel were announced on January 10, 2010, when "The New York Times" reported that Blue Sky was working on a fourth film and was in negotiations with the voice cast. Fox later confirmed on May 5, 2010, that "Ice Age: Continental Drift" would be released on July 13, 2012. A soundtrack album of music by John Powell was released on July 10, 2012 by Varèse Sarabande. In addition to Powell's original score, the film also features Beethoven's 9th Symphony. Powell explained his decision: "At the beginning of the film, the creation of the geographical