Pumice

From Conservapedia
This is an old revision of this page, as edited by DeanS (Talk | contribs) at 22:55, 9 July 2007. It may differ significantly from current revision.

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search
  • A light-colored, frothy volcanic rock, usually of dacite or rhyolite composition, formed by the expansion of gas in erupting lava. Commonly perceived as lumps or fragments of pea size and larger but can also occur abundantly as ash-size particles. (Foxworthy and Hill, 1982)
  • Because of its numerous gas bubbles, pumice commonly floats on water. [1]

References

  1. Glossary of Volcano and Related Terminology