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If an igneous rock contains large percentages of quartz, potassium feldspar and biotite, its composition would be felsic.
The earth's crust and mantle are mostly composed of silicate minerals.
Silicate minerals contain both silicon and oxygen and igneous rocks have a dominant silicate content.
Minerals found in rocks include quartz, olivine, orthoclase feldspar, plagioclase feldspar, amphibole, mica and others.
About Felsic Igneous Rock
Felsic igneous rocks are igneous rocks that are megascopically light in color. This bright or bright color comes from its constituent felsic minerals. Felsic minerals are primary minerals or the main minerals forming igneous rocks, bright or bright in color, composed of the elements Al, Ca, K and Na.
Felsic minerals are divided into three, namely feldspar, felspatoid (foid) and quartz. In rocks, when foid minerals are present, quartz does not appear and vice versa. Furthermore, feldspar is subdivided into alkalis feldspar and plagioclase.
In general, felsic igneous rocks have a color index between 10% - 40%. Felsic igneous rocks composed of quartz minerals are generally acidic in nature, where the silica content is greater than 66%
Learn more about felsic at https://brainly.com/question/12932113.
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