Continental drift is created at spreading centers, and this, along with subduction, drives the system of plates in a chaotic manner, resulting in continuous orogeny and areas of isostatic imbalance. The theory of plate tectonics explains all this, including the movement of the continents, better than Wegener's theory. Hans Stille and Leopold Kober opposed the idea of continental drift and worked on a "fixist" geosyncline model with Earth contraction playing a key role in the formation of orogens. Other geologists who opposed continental drift were Bailey Willis, Charles Schuchert, Rollin Chamberlin and Walther Bucher. In 1939 an international geological conference was held
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