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ttteel ttteel
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6 years ago
Stabilized sand dunes _____.
 a. have only been found on Mars
 b. are protected from erosion by a surface salt crust
  c. are protected from erosion by a surface clay pan
  d. are anchored by yardangs
 e. are normally stabilized by vegetation
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lizziemjordanlizziemjordan
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6 years ago
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ttteel Author
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6 years ago
Thank you, thank you, thank you!
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Yesterday
Thanks for your help!!
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2 hours ago
this is exactly what I needed
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