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- Rhyolite - Wikipedia
Rhyolite is an extrusive igneous rock, formed from magma rich in silica that is extruded from a volcanic vent to cool quickly on the surface rather than slowly in the subsurface
- Rhyolite: An extrusive igneous rock. Photos and definition.
Rhyolite is an extrusive igneous rock formed during eruptions of granitic magma Pumice, obsidian, and tuff are associated rock types
- A Complete Guide to Rhyolite: A Common Light-colored Volcanic Rock
Rhyolite is a highly silicic, fine-grained, light-colored volcanic or extrusive igneous rock It is a felsic rock with mainly quartz, alkali feldspar, plagioclase, and minor ferromagnesian minerals content
- Rhyolite - Rockhounding Wiki
What Is Rhyolite? Definition: Rhyolite is a fine-grained extrusive igneous rock with the same composition as granite (felsic, high silica) It forms from the rapid cooling of felsic lava at Earth's surface
- Rhyolite: Mineral information, data and localities.
Rhyolite grades into rhyodacite with decreasing alkali feldspar content and into trachyte with a decrease in quartz
- USGS: Volcano Hazards Program Glossary - Rhyolite
Rhyolite Volcanic rock (or lava) that characteristically is light in color, contains 69 or more percent of silica, and is rich in potassium and sodium Low-silica rhyolite contains 69 to 74 percent silica High-silica rhyolite contains 75 to 80 percent silica
- Rhyolite - Geology 1501 - ECU
Type Igneous Rock Texture Aphanitic (Fine-grained) Origin Extrusive Volcanic Chemical Composition Felsic Color Light Gray Mineral Composition Potassium Feldspar, Quartz, Sodium Plagioclase, Biotite, Hornblende Miscellaneous Flow banding Tectonic Environment Convergent Boundary – Andean-type subduction zones, intracontinental hot spots and rifts
- Rhyolite: Identification, Pictures Info for Rockhounds
Rhyolite is an extrusive, aphanitic (fine-grained), light-colored (felsic) igneous rock consisting of between 20-90% quartz, less than 15% dark-colored minerals, and feldspar
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