
Volcanic Lava Tubes (17 pics)
- Category: Pics |
- 5 Mar, 2009 |
- Views: 7844 |
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Lava tubes are natural conduits through which lava travels beneath the surface of a lava flow, expelled by a volcano during an eruption. They can be actively draining lava from a source, or can be extinct, meaning the lava flow has ceased and the rock has cooled and left a long, cave-like channel.