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How are geodes formed?

Asked by elismyer - 1 year 8 months ago

 

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Answered by oz
1 year 8 months ago
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Geodes are geological rock formations which occur in sedimentary and certain volcanic rocks.
Geodes are essentially rock cavities or vugs with internal crystal formations or concentric banding.
See pictures and more details in link.
http://en.wikipedia.org/wiki/Geode


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