If you fly over central Illinois during the early spring, you will seeslight differences in soil color due to variations in moisturecontent—wetter soil is darker. These variations outline theshapes of polygons that are tens of meters across. What dothese patterns represent?

Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
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 If you fly over central Illinois during the early spring, you will see
slight differences in soil color due to variations in moisture
content—wetter soil is darker. These variations outline the
shapes of polygons that are tens of meters across. What do
these patterns represent?

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