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Hello and welcome to CoreFacts, where we're always short on time and big on science. I'm Dane Klima.
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Now back to CoreFacts. Today's question is about Lava Tube.
What is a lava tube?
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 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.
And now you know. Join us every week for a new CoreFact. If you're looking for more in-depth science coverage, please check out the USGS CoreCast at usgs.gov/corecast. To have your own question potentially featured on the air, send it to firstname.lastname@example.org or leave a voicemail with us at 703-648-5600; however do remember that this may be a long distance charge.
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Title: What is a lava tube?
Description: Listen to hear the answer.
Date Recorded: 9/17/2008
Usage: This audio file is public domain/of free use unless otherwise stated. Please refer to the USGS Copyright section for how to credit this audio.
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