Silicic: Difference between revisions
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'''Silicic''' is a term used to describe [[magma]] or [[igneous]] rock rich in [[silica]]. The amount of |
'''Silicic''' is a term used to describe [[magma]] or [[igneous]] rock rich in [[silica]]. The amount of silica that constitutes a silicic rock is usually put at at least 65 percent. [[Granite]] and [[rhyolite]] are typical silicic [[Rock (geology)|rocks]]. |
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Silicic is the group of silicate magmas which will eventually crystallise a relatively small proportion of ferromagnesian |
Silicic is the group of silicate magmas which will eventually crystallise a relatively small proportion of ferromagnesian [[silicate]]s, such as [[amphibole]], [[pyroxene]], and [[biotite]]. |
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Rocks containing more than 66% silica are silicic. |
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[[Category:petrology]] |
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Revision as of 20:03, 30 January 2008
Silicic is a term used to describe magma or igneous rock rich in silica. The amount of silica that constitutes a silicic rock is usually put at at least 65 percent. Granite and rhyolite are typical silicic rocks.
Silicic is the group of silicate magmas which will eventually crystallise a relatively small proportion of ferromagnesian silicates, such as amphibole, pyroxene, and biotite.
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