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Shanu posted an Question
July 05, 2021 • 08:57 am 10 points
  • IIT JAM
  • Geology (GG)

A plutonic rock consisting only of plagioclase, pyroxene and hornblende as major minerals is known as (a) dunite (c) granite b) lherzolite (d) diorite

A plutonic rock consisting only of plagioclase, pyroxene and hornblende as major minerals is known as (A) dunite (C) granite B) lherzolite (D) diorite

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  • Sahil kumar gouda

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    Saurabh 1 Best Answer

    Correct option most probably would be (D). Dunite is a monomineralic rock with major composition comprising of olivine. Lherzolite is a rock classified under Peridotites and it mainly consist of olivine and pyroxenes(opx and cpx). While granite is mainly a felsic rock with quartz as one of the major component. And at last, diorite which have some darker and lighter minerals like plagioclase, hornblende , pyroxenes, etc.

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    yes sir D is right

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