Changes

[[Image:Dacite.jpg|thumb|300px|Close view of dacite lava from the May 1915 eruption of Lassen Peak, California]]'''Dacite''' lava is most often light gray, but can be dark gray to black. Dacite lava consists of about 63 to 68 percent [[silica]] (<math>SiO_2</math>). Common minerals include plagioclase feldspar, pyroxene, and amphibole. Dacite generally erupts at temperatures between 800 and 1000°C. It is one of the most common rock types associated with enormous Plinian-style eruptions. When relatively gas-poor dacite erupts onto a volcano's surface, it typically forms thick rounded lava flow in the shape of a dome.

[[Image:Dacite.jpg|thumb|300px|Close view of dacite lava from the May 1915 eruption of Lassen Peak, California]]'''Dacite''' [[lava]] is most often light gray, but can be dark gray to black. Dacite lava consists of about 63 to 68 percent [[silica]] (<math>SiO_2</math>). Common minerals include plagioclase feldspar, pyroxene, and amphibole. Dacite generally erupts at temperatures between 800 and 1000°C. It is one of the most common rock types associated with enormous Plinian-style eruptions. When relatively gas-poor dacite erupts onto a volcano's surface, it typically forms thick rounded lava flow in the shape of a dome.

== Sources ==

== Sources ==

[http://volcanoes.usgs.gov/Products/Pglossary/dacite.html USGS Photo Glossary]

[http://volcanoes.usgs.gov/Products/Pglossary/dacite.html USGS Photo Glossary]

[[Category:Geology]]

[[Category:Igneous rocks]]