IceAge - Glaciers - The Ice Age At least 4 ice sheets in...

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Glaciers - The Ice Age At least 4 ice sheets in last 2 Ma Wisconsin Illinoian Kansan Nebraskan ages are uncertain!
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Records from deep sea confirm there have been about 50 cold/warm cycles in past 2.6 million years. The Ice Age The Ice Age
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Ice or Glacial Age Long-term reduction in T 0 at Earth’s surface and atmosphere. Expansion of ice and presence of extensive ice sheets. Within ice ages, extra cold period termed “glaciation”; warmer periods “interglacials”.
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Oxygen Isotopes in Ocean Sediments Sea surface T 0 linked to atmospheric T 0 . Use organisms in oceans to proxy T 0 . Organisms use oxygen - oceanic O isotopes linked to T 0 . Cold times more O 16 is lost during evaporation than O 18 : High ratios of 18 O / 16 O .
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Coring Continental Ice Ice cores with climate records of the last ~400,000 yrs have been collected in the ice sheets of Greenland and Antarctica.
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Working With Glacial Ice Geologists examine the stable isotope compositions and
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This note was uploaded on 12/01/2011 for the course SCIENCE 460:100 taught by Professor Staff during the Fall '10 term at Rutgers.

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IceAge - Glaciers - The Ice Age At least 4 ice sheets in...

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