Image: Tubular lava helictite
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Description: Example of a tubular lava helictite, from a Hawaiian lava tube. This began as a tubular lava stalactite, a hollow tube that grows from molten lava pushed by gases from within a semi-solid ceiling. Subsequently, uneven crystallization of the molten lava coming through the tube causes growth that is non-gravitometric (i.e., not guided simply by gravity).
Title: Tubular lava helictite
Credit: Own work
Author: Dave Bunnell
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes
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