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.

Gkseries: Gkseries.com is a premier website to provide complete solution for online preparation of different competitive exams like UPSC, SBI PO, SBI clerical, PCS, IPS, IAS, IBPS PO, IBPS Clerical exam etc. & other graduate and post-graduate exams. Learn more on about us page