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Top 20 Directory:
Top : Kids_and_Teens : School_Time : Science : The_Earth : Geology : Water_Sources
Sites:
  		• Aquifer Basics: Offers a brief definition of an aquifer along with pictures and information on various aquifer types, including sandstone and volcanic aquifer rocks.
  		• Aquifers: Provides colored pictures and information on why water is important and how it's frequently used. Features include answers to frequently asked questions and photo galleries.
  		• Edwards Aquifer: Provides information on one of the world's most well-known aquifers. Features graphs and charts, images, essays, and pictures that describe how the aquifer formed.
  		• Georgia's Ground Water Resources: Includes details on what groundwater is, along with information on the cycle it goes through and its movement.
  		• South Dakota Aquifers: Learn more about aquifers by looking at South Dakota's aquifers. Discover what an aquifer is, where they can be found, and its significance to humans in general.
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