onet_feed
30th May 2008, 02:38 PM
An abrupt release of methane about 635 million years ago from ice sheets caused a dramatic shift in climate, triggering a series of events that effectively ended the last "snowball" ice age. Methane clathrate destabilization acted as a runaway feedback to increased warming, and was the tipping point that ended the last snowball Earth.
More... (http://www.sciencedaily.com/releases/2008/05/080528140255.htm)
More... (http://www.sciencedaily.com/releases/2008/05/080528140255.htm)