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Wetland types |
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Prairie potholes |
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Formation |
page 2 of 7 |
After the retreat of glaciers
in North America over 12,000 years ago, millions of
depressions were left behind in the glacial drift. Prairie
potholes receive runoff from surrounding land due to their
depressional nature. Water levels may fluctuate seasonally
with different amounts of precipitation, potholes may even
experience complete drying for several years. |
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