Difference between revisions of "Permafrost"
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The New American Desk Encyclopedia, Penguin Group, 1989 | The New American Desk Encyclopedia, Penguin Group, 1989 | ||
[[Category: Geography]] | [[Category: Geography]] | ||
Revision as of 03:43, May 9, 2008
Permafrost is permanently frozen ground, typical of the treeless plains of Siberia, and common in polar regions.
Sources
The New American Desk Encyclopedia, Penguin Group, 1989