Geology and Minerals

Alkali feldspar granite

Alkali feldspar granite, some varieties of which are called 'red granite', is a felsic igneous rock and a type of granite rich in the mineral potassium feldspar (K-spar). It is a dense rock with a phaneritic texture. The abundance of K-spar gives the rock a predominant pink to reddish hue peppered with minor amounts of black minerals.

Also on this shelf

See also

• ▸Anticline
• ▸Cambridge, Massachusetts
• ▸Earth's mantle

Uncatalogued shelf

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