|
| Preview |
|
|
| Figure number: File name: |
04-05a 04_05a.jpg |
|||
|
|
||||
| Title: | LAVA TUBES |
| Caption: | (a) Holes, called skylights, develop in the roof of some active tubes like this one on Kilauea volcano in Hawai'i. Magma can move many kilometers below ground in tunnels called lava tubes that form below cooled crusts of basaltic lava. Both active and drained tubes can be hazards when roofs collapse. (Photo by Jeffrey Judd, courtesy U.S. Geological Survey) |
| Keywords: | volcanoes, volcanism, volcanic eruptions, shield |