A melanocratic porphyritic rock containing phenocrysts of biotite, with feldspar restricted to the groundmass

A melanocratic porphyritic rock containing phenocrysts of biotite, with feldspar restricted to the groundmass

Q. A melanocratic porphyritic rock containing phenocrysts of biotite, with feldspar restricted to the groundmass, is called

(A) trachyte.              (B) dacite.                  (C) andesite.              (D) lamprophyre.

Ans: lamprophyre.

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