Difference between revisions of "Pegmatite"
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| − | A '''pegmatite''' is an [[igneous]] | + | A '''pegmatite''' is an [[igneous rock]] with very large (usually greater than one inch), well-formed [[crystal]]s. A granitic pegmatite has the [[mineralogy]] of a [[granite]] and abnormally large grains, whereas a gabbroic pegmatite has the mineralogy of a [[gabbro]] and very large grains. A pegmatite can also be an intrusive igneous rock.<ref>Plank and Schenck, 1998: [http://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html Glossary of Volcano and Related Terminology]</ref> |
==References== | ==References== | ||
<references/> | <references/> | ||
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Latest revision as of 17:21, July 13, 2016
A pegmatite is an igneous rock with very large (usually greater than one inch), well-formed crystals. A granitic pegmatite has the mineralogy of a granite and abnormally large grains, whereas a gabbroic pegmatite has the mineralogy of a gabbro and very large grains. A pegmatite can also be an intrusive igneous rock.[1]
References
- â Plank and Schenck, 1998: Glossary of Volcano and Related Terminology