3/5/15

CHRONOLOGY OF THE MAJOR ICE AGES

CHRONOLOGY OF THE MAJOR ICE AGES
Time   (years)       Event
10,000–present     Present interglacial
15,000–10,000     Melting of ice sheets
20,000–18,000     Last glacial maximum
100,000                Most recent glacial episode
1 million                First major interglacial
3 million                First glacial episode in Northern Hemisphere
4 million                Ice covers Greenland and the Arctic Ocean
15 million              Second major glacial episode in Antarctica
30 million              First major glacial episode in Antarctica
65 million              Climate deteriorates; poles become much colder
250–65                million Interval of warm and relatively uniform climate
250 million            The great Permian ice age
700 million            The great Precambrian ice age
2.4 billion              First major ice age

http://geology.utah.gov/surveynotes/gladasked/images/ice_ages1.gif

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