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Jack Oliver is credited with providing seismologic evidence supporting plate tectonics which encompassed and superseded continental drift with the article "Seismology and the New Global Tectonics", published in 1968, using data collected from seismologic stations, including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 Ester Dean, performed by Keke Palmer. Both songs play during the credits and are not available on the soundtrack. "Chasing The Sun" can be found on The Wanted's 2012 American debut extended play, "The Wanted EP", while an alternate version of "We are (Family)" sung only by Keke Palmer is available for download. "Ice Age: Continental Drift" had its premiere on June 20, 2012, at the CineEurope film distributors' trade fair in Barcelona. It publicly premiered on June 27, 2012, in Belgium, Egypt, France, Switzerland, and Trinidad, and was released on July 13, 2012, in the USA. The film is