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Catastrophic flood - Glacial Lake Missoula Giant ripple marks from catastrophic flood.

Published byMillicent O’Brien’ Modified over 9 years ago

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Presentation on theme: "Catastrophic flood - Glacial Lake Missoula Giant ripple marks from catastrophic flood."— Presentation transcript:

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2 Catastrophic flood - Glacial Lake Missoula

3 Giant ripple marks from catastrophic flood

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12 Ice shelves - what are they? How do they form? Why are they important?

13 Ice shelves - what are they? Floating icesheet - form in center of continent and move out under own weight Why are they important? Hold back glaciers/icesheets What has happened recently to ice shelves? Which would be most vulnerable?

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15 Larsen Ice shelf Gone 2002 Wilkins 2008

16 1/31/02 Larsen B Ice Shelf, Antaractic Peninsula

17 2/17/02

18 2/23/02

19 Adelie penguin populations are declining abruptly in the Antarctic Peninsula, where populations of other penguins occurring farther north are growing From National Geographic, 9/04, p. 17

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