Geode Couples

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Collecting Geode pairs can be an exciting learning experience! This pair proves conclusively that gravity is not a consideration in forming the "Top Plate" because here one is up, the other is down.

Notice the right geode has a lot more white in it than the left one does. That is because there was more water in it that allowed the formation of opal. Why? How much moving around in do geodes do in the flow? You will see some that were fortification patterns until they collided, disrupting the patterns. See "The Secret Lives of Geodes" for an introduction in interpreting what you might see.