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Jack Oliver is credited with providing seismologic evidence supporting plate tectonics which encompassed and superseded continental drift with the article "Seismology and the New Global Tectonics", published in 1968, using data collected from seismologic stations, including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 $181 million, only behind "Marvel's The Avengers". Review aggregator Rotten Tomatoes reports that 38% of critics have given the film positive reviews, with a rating average of 5.1/10 based on 131 reviews. The consensus statement reads, ""Ice Age: Continental Drift 3D" has moments of charm and witty slapstick, but it often seems content to recycle ideas from the previous films." Another review aggregator, Metacritic, which assigns a normalized rating out of 100 top reviews from mainstream critics, calculated a score of 49 based on 29 reviews, indicating "mixed or average reviews." Audiences polled by CinemaScore gave the film an average