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What type of composition does an igneous rock have that contains mostly plagioclase feldspar and about 30 percent dark silicate minerals?

A. basaltic
B. granitic
C. andesitic
D. ultramafic

2 Answers

3 votes
the answer is C.) Andesitic.
User Shwetanka
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2 votes

Answer:

The correct answer is option C, that is, andesitic.

Step-by-step explanation:

Andesite is the term used for a fine-grained extrusive rocks family, which are generally light to dark gray in appearance. They generally weather to different shades of brown. Andesite mostly comprises plagioclase feldspar minerals and may also comprise pyroxene, biotite, or amphibole as the dark silicate minerals. It generally does not comprise olivine or quartz.

User Hero Tra
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