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What is an unidentified light-colored igneous rock is made up of orthoclase feldspar and quartz?
The unidentified light-colored igneous rock composed of orthoclase feldspar and quartz is likely a type of granite. Granite is a coarse-grained rock that typically contains a significant amount of quartz and feldspar, giving it a light color. The presence of orthoclase feldspar, in particular, suggests a granitic composition, as this mineral is a common constituent of such rocks. Other minerals may also be present, but the dominant components indicate it is likely a granitic rock.
Which igneous rock is composed of coarse grained crystals of quartz feldspar and mica?
Felsic igneous rocks (the lightest in color) are comprised mostly of quartz and potassium feldspar. Intermediate igneous rocks (somewhat darker than felsic) are made up of some quartz and potassium feldspar, but mostly plagioclase feldspar.
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 two main feldspar groups?
The two main feldspar groups are potassium feldspar (orthoclase and microcline) and plagioclase feldspar (albite and anorthite). They are common rock-forming minerals in the Earth's crust and are essential components in many igneous and metamorphic rocks.
Which igneous rock is dark colored cooled rapidly on earths surface and is composed mainly of plagioclase feldspar olivine and pyroxene?
scoria
Which igneous rock is composed of coarse grained crystals of quartz feldspar and mica?
Felsic igneous rocks (the lightest in color) are comprised mostly of quartz and potassium feldspar. Intermediate igneous rocks (somewhat darker than felsic) are made up of some quartz and potassium feldspar, but mostly plagioclase feldspar.
Quartz and potassium feldspar grains are the main constituents of which rock?
Granite is the rock composed mainly of quartz and potassium feldspar grains.
Light colored igneous rocks that are rich in aluminum potassium silicon and sodium are called what kind of rocks?
The light-colored igneous rocks rich in aluminum, potassium, silicon, and sodium are called felsic rocks. These rocks have a high content of minerals like quartz, feldspar, and muscovite, giving them their characteristic light color. Examples of felsic rocks include granite and rhyolite.
Which igneous rock cooled slowly under ground and contains mostly quartz and potassium?
Granite is an example of an igneous rock that cooled slowly underground and contains mostly quartz and potassium feldspar.
Light-colored igneous rocks that are rich in aluminum potassium silicon and sodium are called what rocks?
Felsic rocks are light-colored igneous rocks rich in aluminum, potassium, silicon, and sodium. Examples include granite and rhyolite.
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 two main feldspar groups?
The two main feldspar groups are potassium feldspar (orthoclase and microcline) and plagioclase feldspar (albite and anorthite). They are common rock-forming minerals in the Earth's crust and are essential components in many igneous and metamorphic 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.
Which igneous rock is dark colored cooled rapidly on earths surface and is composed mainly of plagioclase feldspar olivine and pyroxene?
scoria
Is orthoclase a rock or a mineral?
Orthoclase feldspar is a tectosilicate mineral which is most commonly found in igneous rock. It has a Mohs hardness of 6 and has two cleavage planes which occur at right angles to each other. It is the potassium endmember of the feldspar group of minerals and is also referred to as alkali feldspar or K-spar. Orthoclase will appear in colors from white to deep pink, but has a white streak.
What happens when carbonic acid is mixed with feldspar?
Feldspar, a major constituent of most igneous rocks, reacts with carbonic acid to produce residual clay minerals plus dissolved ions of metals (potassium, sodium or calcium, depending on the type of feldspar). Here, for example, is the reaction by which potassium feldspar is converted to kaolinite, a clay mineral: 4KAlSi3O8 + 4H2CO3 + 2H2O → Al4Si4O10(OH)8 + 4K+ + 4HCO3- + 8SiO2 feldspar + carbonic acid + water → kaolinite + dissolved potassium and bicarbonate ions + dissolved silica Similar reactions affect sodium feldspar and calcium feldspar.
What are the types of feldspar?
There are broadly three main types of feldspars: calcium, sodium and potassium. They have the following general chemical formulas:KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8The endmember mineral states are known as K-Feldspar, Albite and Anorthite which are the potassium, sodium and calcium feldspars respectively.There can be a mix of calcium and sodium (more correctly termed solid solutions) in Feldspars between Albite and Anorthite which are known generally as Plagioclase feldspars.For more information please see the related question
