Encyclopedia > Magma

  Article Content

Magma

This article is about the type of rock. For magmas in mathematics, see Magma (algebra). For the rock band, see Magma (band).

Magma is molten rock often located inside a magma chamber[?] beneath the surface of the earth. Magma in Earth is a complex high-temperature silicate solution that is ancestral to all igneous rocks, both intrusive and effusive. Magma is under high pressure and sometimes emerges through volcanic vents in the form of lava. It usually contains dissolved gases and water which have never before reached the planet's surface. Magma collects in many separate magma chambers within the Earth's crust, and so may have slightly different compositions in different places.



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Paderborn (district)

... of Büren. Towns and municipalities Bad Lippspringe[?] Bad Wünnenberg[?] Büren[?] Delbrück[?] Lichtenau[?] Paderborn Salzkotten[?] Municipalities ...