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Q: Would you expect to find plagioclase feldspar or biotite in a greater variety of igneous rocks?
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What mineral does magma turn into when it cools?

Magma solidifies into a combination of minerals that are collectively called igneous rock. Minerals common in igneous rock are potassium feldspar, plagioclase feldspar, muscovite and biotite mica, quartz, hornblende, olivine, and magnetite.

What describes an andesite?

Andesite are fine-grainedextrusive, igneous volcanic rock composed essentially of plagioclase feldspar and one or more mafic minerals, such as hornblende, pyroxene or biotite.(Refer to -Igneous Rocks)

What is granodiorite?

Granodiorite is an intrusive igneous rock. Its composition is similar to that of granite but it contains more plagioclase than potassium feldspar. Biotite and hornblende are also abundant minerals in granodiorite.

What are the six minerals that make up igneous rocks?

Olivine, Pyroxene, Amphibole, Biotite, Muscovite, Potassium Feldspar, Quartz, Plagioclase are the minerals that make up the Igneous Rocks!:)another one is mica

What igneous rock contains mostly plagioclase feldspar and about 30 percent dark silicates?

A Diorite.

Is a granite a rock or a mineral?

Granite is an igneous rock. It is commonly formed from the following minerals. Quartz, potassium and Plagioclase Feldspars and Biotite Mica.

What are the four kinds of igneous rock?

Igneous rocks are usually classified first by their color index. The color index is separated into four categories. Felsic rocks are the lightest and are composed of mostly quartz and potassium feldspar. Intermediate rocks are the second lightest and are made up of mostly plagioclase feldspar, pyroxene, amphibole, and biotite. Mafic rocks are made up of plagioclase feldspar, pyroxene, and amphibole. Ultramafic is made up of mostly olivine, with pyroxene and amphibole.

What is an andesyte?

An andesyte is a class of fine-grained intermediate igneous rock, mostly containing plagioclase feldspar.

Definitions for basaltic composition?

a compositional group of igneous rocks indicating that the rock contains substantial dark silicate minerals and calsiumrich plagioclase feldspar. a compositional group of igneous rocks indicating that the rock contains substantial dark silicate minerals and calsiumrich plagioclase feldspar.

What is diorite?

Diorite is an intrusive igneous rock mostly composed of plagioclase feldspar, biotite mica, hornblende, and/or pyroxene. It mostly appears as gray in color, or whitish with black specs--a salt and pepper look. It may contain small amounts of quartz.

Which the following is a fine grained light colored extrusive igneous rock?

fine grained extrusive rocks can contain Potassium and Plagioclase Feldspar, Quartz, Biotite, Amphibole, Pyroxene and Olivine. these are all the choices for every igneous rocks

What are the chemical formula for diorite?

Diorite does not have a chemical formula. Chemical formula are for compounds. Diorite is a mixture of several compounds. The coposition of diorite is variable, so there is no chemical formula that could describe it.