Unformatted text preview: absorption. 3) Enormous outpourings of gases to the atmosphere from the North Atlantic Ocean occurred. 4) Oceans changed their style of density differentiation. Warm oxygen poor waters sank and circulated in the deep sea. Late Cenozoic Ice Age- 1) Breakup of the continents which have altered seaways 2) Continental masses have moved into polar latitudes, centering around the poles, giving rise to glacial conditions. Glacial Advance and Retreat Cycles: 1) Eccentricity of the Earth’s orbit around the Sun. 2) Tilt of the Earth’s axis. The tilt is between 21.5 degrees to 24.5, with a present 23.5 tilt, causing seasonal extremes. 3) Wobble, with periodicities of 23,000 and 19,000. Milder winters in the northern hemisphere caused by wobble....
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- Spring '08
- large continental masses, aluminum ore bauxite