Materials
Rhyolite
Igneous Rocks
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Rhyolite is the most silica-rich of the volcanic rocks, generally glassy or fine-grained in texture but sometimes porphyritic, with larger phenocrysts set in a fine-grained groundmass. It is the extrusive equivalent of granite, formed from silica-rich magma extruded from a volcanic vent and cooled quickly at the surface.
Facts
Formation ClassIgneous, extrusive (the extrusive equivalent of granite, formed from silica-rich magma cooling quickly at the surface) 1 Cross-Tradition Connections
Associated With
Compositional series: dacite sits between andesite and rhyolite in silica content.
Sanidine and plagioclase are both feldspar-group minerals; feldspar is a principal mineral of rhyolite.
Extrusive equivalent of intrusive granite.
Quartz named directly as a predominant mineral of rhyolite.
In Discipline
Sources
1. Rhyolite (Wikipedia)
Wikimedia FoundationLead sectionQuote, Lead section
It is the extrusive equivalent of granite.
1. Rhyolite (Wikipedia)
Wikimedia FoundationAssociated With: Feldspar, Mineralogy sectionQuote, Associated With: Feldspar, Mineralogy section
The mineral assemblage is predominantly quartz, sanidine, and plagioclase.
1. Rhyolite (Wikipedia)
Wikimedia FoundationAssociated With: Quartz, Mineralogy sectionQuote, Associated With: Quartz, Mineralogy section
The mineral assemblage is predominantly quartz, sanidine, and plagioclase.
Dacite (Wikipedia)
Wikimedia FoundationAssociated With: Dacite, Lead sectionQuote, Associated With: Dacite, Lead section
intermediate in composition between andesite and rhyolite.
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