Information AboutRhyolite |
| CATEGORIES ABOUT RHYOLITE | |
| igneous rocks | |
| volcanology | |
| SHOPPER'S DELIGHT | |
|
Rhyolite is an and Pyroxene are common accessory minerals. Rhyolite can be considered as the Extrusive equivalent to the Plutonic Granite rock. Due to their high content of silica and low iron and magnesium contents, rhyolites polymerize quickly and form highly viscous Lava s. They can also occur as Breccia s or in Volcanic necks and Dikes . Rhyolites that cool too quickly to grow crystals form a natural glass or vitrophyre, also called Obsidian . Slower cooling forms microscopic crystals in the lava and results in textures such as flow foliations, spherulitic, nodular, and lithophysal structures. , below that is Pumice and in lower right corner is rhyolite (light color)]] SEE ALSO |