| |
Volcano - Facts, Information, and Encyclopedia Reference article |
 | | A volcano is a geological landform (usually a mountain) where magma (rock of the Earth's interior made molten or liquid by extremely high temperatures along with a reduction in pressure and/or the introduction of water or other volatiles) erupts through the surface of the planet. |
 | | Some volcanoes consist of a crater alone, with scarcely any mountain at all; but in the majority of cases the crater is situated on top of a mountain (the volcano), which can tower to an enormous height. |
 | | Volcanoes that terminate in a principal crater are usually of a conical form. |
| www.startsurfing.com /encyclopedia/v/o/l/Volcano.html (3634 words) |