EESA06H3 Chapter Notes - Chapter 9: Enhanced Weathering, Ocean Current, Pleistocene
The repeated growth and decay of large continental ice sheets over the past 2 million years shaped and molded the landscape upon which we live. Module describes the most recent glaciation when southern ontario was buried under more than a kilometre of ice. There is a strong link between tectonics and long-term climate change throughout earth"s history. The present long-term cooling trend started about 20 million years when the continent of. India collided with eurasia, forming the himalayans mountains: this massive reconfiguration of the earth"s surface changed the way heat was distributed by circulation both in the atmosphere and in the oceans. Atmospheric levels of carbon dioxide, a greenhouse gas, were also lowered as result of enhanced weathering processes during sediment production. Glaciation of antarctica began shortly after, but the earth did not cool sufficiently for ice sheets to grow in north america until the pleistocene epoch, 2. 1 million years.