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2 February, 20:55

Which is a coarse-grained, igneous rock composed mainly of pyroxene, plagioclase feldspar, and olivine?

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  1. 2 February, 23:08
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    The answer is gabbro.

    Gabbro is a group of rocks that are igneous and phaneritic (coarse-grained). It is formed when magma trapped beneath the surface begins to cool slowly. It consists of pyroxene, feldspar, plagioclase, and, in smaller ratio, olivine. Gabbro's common name is 'black granite'.
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