How Are Geodes Formed?

Answer

Geodes are formed when layers of rock have empty cavities. Fluids that can contain a variety of dissolved minerals eventually make their way into the cavities, and the crystals of the geodes grow within that confined space. You can find more information here: http://www.rocksforkids.com/R&M/geodes.html
Q&A Related to "How Are Geodes Formed"
Geodes, which take thousands of years to form, begin with the formation of a cavity. This cavity can be the inside of a shell that is stuck in sediment. The shell will fill with a
http://www.ehow.com/how-does_5004589_how-geodes-fo...
We don't know but we have a theory for two types. Partly hollow balls filled mostly with
http://www.chacha.com/question/how-are-geodes-form...
Unknown, but one theory is appx 240m years. There is much that is still not understood about the mysterious geode.
http://wiki.answers.com/Q/How_long_does_it_take_fo...
1. Shape. Look for round or oval shaped rocks. Sharp, pointy rocks are not likely to yield a geode no matter how often you hammer at them. Ad. 2. Bumps. Look for a lumpy surface,
http://www.wikihow.com/Identify-an-Unopened-Geode
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Ask.com Answer for: how are geodes formed
How Are Geodes Formed?
Geodes, which take thousands of years to form, begin with the formation of a cavity. This cavity can be the inside of a shell that is stuck in sediment. The shell will fill with a concentration of salt. The shell can either turn into a fossil or be... More »
Difficulty: Easy
Source: www.ehow.com
Different types of geodes are formed in different ways. For instance, a volcanic geode is formed by cooling lava while a sedimentary geode is formed in an underwater process where sediments attach themselves to tiny animals. You can find more information here: http://earthsky.org/earth/how-are-geodes-formed
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