Rhyolite is an extrusive igneous rock formed during eruptions of granitic magma. Pumice, obsidian, and tuff are associated rock types.

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. It is generally light in color due to its low content of mafic minerals, …

2023年3月13日 · A group of extrusive igneous rocks, typically porphyritic and commonly exhibiting flow texture, with phenocrysts of quartz and alkali feldspar in a glassy to cryptocrystalline groundmass; also, any rock in that group; the extrusive equivalent of granite.

rhyolite, extrusive igneous rock that is the volcanic equivalent of granite. Most rhyolites are porphyritic, indicating that crystallization began prior to extrusion.

2023年6月20日 · Rhyolite is a light-colored, fine-grained, or glassy volcanic (extrusive igneous) rock. It is a silica-rich, felsic rock (high in light-colored minerals like quartz and feldspars) and low in mafic minerals.

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. Alkali feldspar makes up 35 to 100% of the total feldspar content.

2019年3月19日 · Rhyolite is an extrusive, silica-rich igneous rock. Rhyolite has a similar composition and appearance to granite. However, rhyolite forms as a result of a violent volcanic eruption, while granite forms when magma solidifies beneath the Earth's surface.

Rhyolite is an extrusive igneous rock formed from the rapid cooling of high-silica magma at or near the Earth’s surface during volcanic eruptions. It is the volcanic equivalent of granite, sharing a similar chemical composition but differing in texture due to its formation process.

2022年10月14日 · Rhyolite is an extrusive igneous rock and is high in silica content. This fine grained igneous rock will typically contain the minerals quartz, plagioclase, and sanidine with lesser amounts of biotite and hornblende. Rhyolite is formed closer to the surface of the earth.

Rhyolite is one of the many igneous rocks found on the Earth’s surface. This article tells you about the formation of rhyolite, and its various uses. Rhyolite is the most common source of volcanic ash and pumice in Idaho.