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alkali feldspar granite

Called red granite previously (Sims, 1990). alkali-feldspar granite of Cumberland - Gray to blue-gray. The specific gravity of Alkali Feldspar Granite is 2.6-2.7. Igneous > Plutonic > Granitic > Alkali-feldspar-granite (Stock or pipe) Red to pink, medium-grained leucocratic alkali feldspar granite; contains miarolitic cavities; biotite is altered to opaque oxide minerals; contains fluorite locally. Alkali Feldspar Granite cleavage is not available. Luster of Alkali Feldspar Granite is the interaction of light with the surface of Alkali Feldspar Granite. Many rocks have both feldspars, like granite. Alkali feldspar (also called potassium feldspar or K-feldspar) has a color range from white to brick-red, and it's typically opaque. 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. Search Photos of Peralkaline alkali-feldspar-granite Edit Add Synonym Add Sub-type (rock) Edit CIF structures Clear Cache A term that may be used for a variety of alkali feldspar granite that contains alkali pyroxene and/or amphibole . The differences can be subtle and confusing. Exposed in both Pembine-Wausau and Marshfield terranes. Luster of Alkali Feldspar Granite is dull to grainy with sporadic parts pearly and vitreous. Alkali feldspar granite. Massive to locally foliated. Alkali feldspar granite. Cases like that are helpful for learning to tell the feldspars apart. The abundance of K-spar gives the rock a predominant pink to reddish hue; peppered with minor amounts of black minerals. medium- to coarse-grained, equigranular to porphyritic alkali-feldspar granite (phenocrysts of perthite).

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