Preview
Figure number:
File name:		 04-05b
04_05b.JPG		      
The preview Image has been scaled down to fit the screen. Actual image is both larger and clearer.
Title: LAVA TUBES
Caption: (b) Older drained tubes, like the Thurston (Nahuku) lava tube shown here near the summit of Kilauea, are attractions for tourists. 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. (Courtesy U.S. Geological Survey Volcanic Hazards Team)
Keywords: volcanoes, volcanism, volcanic eruptions, shield