Safety toolbox topic on the different chemical label colors and numbers and what they mean Safety toolbox topic on the different chemical label colors and numbers and what they mean
Ice Age: Continental Drift. Ice Age: Continental Drift is a 2012 American 3-D computer-animated adventure/comedy film directed by Steve Martino and Mike Thurmeier. It is the fourth installment of the Ice Age series, being produced by Blue Sky Studios and distributed by 20th Century Fox, and the first sequel not to be directed by Carlos Saldanha.
The theoretical extent of these ice sheets during the ice age 1.5 mya is shown in white on the map below. (White area = maximum glacial extent 1.5 million years ago in the Pleistocene Epoch - Microsoft Encarta) Ice ages are said to have occurred every 150 million years, and last for at least 1 million years. According to the ice age theory, our current warm period will end with the beginning of another cold phase in 23,000 years time. Geologists claim that there have been 5 major ice ages. During ice ages the boundary of the ice sheet is hypothesised to spread and contract in cycles.