Difference between revisions of "Lava tube"
(New page: {{stub}} Erupting lava flows often form a '''lava tube''' as the outer surfaces of the flow are cooled by the atmosphere and surrounding rock. Once the eruption ends, the remaining lav...) |
(Added links and USGS description of lava tubes (public domain - U.S. government)) |
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| − | + | During long-lived eruptions, lava flows tend to become "channeled" into a few main streams. Overflows of lava from these streams solidify quickly and plaster on to the channel walls, building natural levees or ramparts that allow the level of the lava to be raised. Lava streams that flow steadily in a confined channel for many hours to days may develop a solid crust or roof and thus change gradually into streams within '''lava tubes'''. Because the walls and roofs of such tubes are good thermal insulators, lava flowing through them can remain hot and fluid much longer than surface flows. Tube-fed lava can be transported for great distances from the eruption sites.<ref>http://vulcan.wr.usgs.gov/Glossary/LavaTubes/description_lava_tubes.html</ref> Once the eruption ends, the remaining lava drains from the tube, leaving an empty [[caves|cave]]. | |
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==Settlement== | ==Settlement== | ||
:''Main article: [[Volcanic cave settlement]]'' | :''Main article: [[Volcanic cave settlement]]'' | ||
Lava tubes are an ideal site for a [[settlement]], providing shelter from [[radiation]] and space that can be converted into habitable areas. | Lava tubes are an ideal site for a [[settlement]], providing shelter from [[radiation]] and space that can be converted into habitable areas. | ||
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| + | ==References== | ||
| + | <references/> | ||
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| + | ==External Links== | ||
| + | * Virtual Lava Tube[http://www.goodearthgraphics.com/virtual_tube/virtube.html] | ||
| + | * Lava Tubes on USGS site[http://vulcan.wr.usgs.gov/Glossary/LavaTubes/description_lava_tubes.html] | ||
==See Also== | ==See Also== | ||
Revision as of 08:43, 18 January 2009
During long-lived eruptions, lava flows tend to become "channeled" into a few main streams. Overflows of lava from these streams solidify quickly and plaster on to the channel walls, building natural levees or ramparts that allow the level of the lava to be raised. Lava streams that flow steadily in a confined channel for many hours to days may develop a solid crust or roof and thus change gradually into streams within lava tubes. Because the walls and roofs of such tubes are good thermal insulators, lava flowing through them can remain hot and fluid much longer than surface flows. Tube-fed lava can be transported for great distances from the eruption sites.[1] Once the eruption ends, the remaining lava drains from the tube, leaving an empty cave.
Settlement
- Main article: Volcanic cave settlement
Lava tubes are an ideal site for a settlement, providing shelter from radiation and space that can be converted into habitable areas.
