Rhyolite - Wikipedia
网页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, and it is typically very fine-grained (aphanitic) or glassy. [5]
Rhyolite: An extrusive igneous rock. Photos and definition. - Geology.com
网页Rhyolite is an extrusive igneous rock with a very high silica content. It is usually pink or gray in color with grains so small that they are difficult to observe without a hand lens. Rhyolite is made up of quartz, plagioclase, and sanidine, with minor amounts of hornblende and biotite.
A Complete Guide to Rhyolite: A Common Light-colored Volcanic …
网页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 rock is usually pinkish to light gray but can be buff (pale brownish yellow), yellowish, reddish, bluish-gray, or reddish purple.
流纹岩 - 百度百科
网页流纹岩（Rhyolite）一种相当于 花岗岩 (granite)的 火山 喷出岩。 大多数流纹岩都具 斑状结构，表明结晶作用在喷发作用以前就已开始。 有时当岩浆还埋藏得很深时，结晶作用就可能已经开始了；在这种情况下，所形成的岩石就可能主要由在喷出时已经发育良好的单个大晶体 (斑晶)构成。 最后产物中的微晶质基质的含量就可能太少，不在显微镜下就难以看出来。 这样的岩石 (斑流岩)从手标本上看很容易错认为花岗岩。
Rhyolite | Igneous Rock | Britannica
网页Rhyolite, extrusive igneous rock that is the volcanic equivalent of granite. Most rhyolites are porphyritic, indicating that crystallization began prior to extrusion. Crystallization may sometimes have begun while the magma was deeply buried; in such cases, the rock may consist principally of.
Rhyolite Rock | Properties, Composition, Formation, Uses
网页2023年3月13日 · Rhyolite, with felsic minerals comprising >20% quartz and alkali feldspar/plagioclase 40-90%. 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 …
Rhyolite Rock Facts: Geology and Uses - ThoughtCo
网页2019年3月19日 · Rhyolite is a silica-rich igneous rock found throughout the world. The rock received its name from German geologist Ferdinand von Richthofen (better known as the Red Baron, a World War I flying ace). The word rhyolite comes from the Greek word rhýax (a stream of lava) with the suffix "-ite" given to rocks.
Rhyolite - SpringerLink
网页Rhyolite is a fine-grained or glassy igneous rock chemically and mineralogically the volcanic equivalent of granite. The name was originally applied to such rocks by von Richthofen (1860, see Johannsen, 1932) on account of the frequently displayed flow banding (prefix rhyo-, from Greek rhyox, stream of lava).
Rhyolite - HyperPhysics
网页Rhyolite is an igneous rock in the class designated as "felsic" rock. This class of rock crystallizes from silicate minerals at relatively low temperatures and with relatively a high percentage of silica . It is at the low temperature extreme of the Bowen reaction series.
Rhyolite - an overview | ScienceDirect Topics
网页Rhyolite is an extrusive igneous rock that is the equivalent of granite magma, composed mainly of quartz, K-feldspar, and biotite. It can have various textures, such as glassy, aphanitic, and porphyritic, and is often characterized by sanidine and rare quartz, plagioclase, and biotite.
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