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"Glass Worms" On Mars May Be "Lava Tubes"

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Posted by Wayne Hollyoak on June 13, 2001 14:48:02 UTC

The "glass worms" or tubular passages seen on the Mars surface may be lava tubes.

Lava flows can leave tubular shells behind along surfaces as the liquid core flows away downstream of a vent leaving a cooler hardened outer crust. Usually this occurs at volcanos, but not always.

see:

http://www.goodearthgraphics.com/virtual_tube/virtube.html

Wayne

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