How are Agates Formed?

How Agates are created…

Agates develop as secondary deposits in hollow cavities, called vesicles. Although they can form in all types of host rock, most of the world’s agates developed in ancient volcanic lava. When the continents were first forming, layers of molten lava pushed toward the earth’s surface through rift zone cracks, volcanoes, and other geologic events.

pictures courtesy of RockOn Omaha

http://www.agatelady.com/agate-basics.html

 

 

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