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.

Tilling, R.I., 1998, Volcanoes: U.S. Geological Survey General Interest Publication, 45 p. 


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