Sunday, August 21, 2011

Reticulite: An extreme form of pumice!

Reticulite is an extreme form of pumice formed within high lava fountains; about 1,000 feet, (300 meters), high, or more. Dissolved gasses within the lava form bubbles which expand until they burst, leaving behind a fragile,  honeycomb - like structure. In spite of its light weight, reticulite does not float. Drop a piece of reticulite in some water and it will sink much like chicken wire.

Photo: Warren Costa

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