The Volcanic Fine Grained Compositional Equivalent Of Granite

It consists of the plagioclase feldspar minerals andesine and oligoclase together with one or more dark ferromagnesian minerals such as pyroxene and biotite. The fine grained equivalent of granite. Friman wikimedia commons granite the equivalent of its extrusive volcanic rock type rhyolite is a very common type of intrusive igneous rock.

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Rhyolite Can Be Considered As The Extrusive Equivalent To The Plutonic Granite Rock And Consequently Outcrops Of Rhyolite May B Rhyolite Igneous Rock Geology

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Its principal minerals are feldspars quartz and mica.

The volcanic fine grained compositional equivalent of granite.

Andesite and diorite likewise refer to extrusive and intrusive intermediate rocks with dacite and granodiorite applying to those rocks with composition between felsic and intermediate. One example of an aphanitic rock with felsic composition. The fine grained volcanic equivalent of granite is basalt. Andesite is the volcanic equivalent of diorite.

Granites and rhyolites compositionally equivalent to granite but of a fine grain size are composed mainly of orthoclase feldspar quartz plagioclase feldspar mica and amphibole. An ultralight felsic vesicular rock. Intermediate in silica content it is usually gray in color and may be fine grained or porphyritic. A vesicular rock also known as cinder.

This chart illustrates the generalized mineral composition of igneous rocks. Material consisting of rock glass ash and scoria ejected during violent volcanic eruptions. It contains more than 68 weight of silica in composition and is granular and coarse grained in texture. Rhyolite refers to the volcanic and felsic igneous rocks and granite refer to intrusive and felsic igneous rocks.

Rhyolite Porphyry Rhyolite Is A Very Fine Grained To Glassy Extrusive Igneous Rock I E Volcanic Usually Light In Colour Bu Igneous Rock Igneous Geology

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