Volcanoes General - 2 of 25

Volcanoes General FAQs - 25 Found

Can volcanic rocks float?

The violent separation of gas from lava may produce rock froth called pumice. Some of this froth is so light -- because of the many gas bubbles -- that it floats on water.


Learn More:

Volcanoes, 1998, USGS General Interest Publicaton, 45 p.



Tags: Geothermal Resources, Earthquakes, Tectonics, Monitoring, Volcanoes, Lava, Seismicity, Ring of Fire