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"
Cavity 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
http://www.ehow.com/how_5004589_how-geodes-formed....
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
Geodes can form in gas bubbles in igneous rocks, such as vesicles in basaltic lavas, or as in the American Midwest, rounded cavities in sedimentary formations. After rock surrounding
http://answers.yahoo.com/question/index?qid=201001...
how big can geodes be.
http://wiki.answers.com/Q/How_big_can_geodes_be
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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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