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17 February, 16:29

In general how does the characteristic mineral composition of a light colored igneous rock differ from that of a dark colored rock

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  1. 17 February, 16:36
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    Light colored igneous rock is called felsic, it is high in quartz, muscovite mica, and orthoclase feldspar content. Dark colored igneous rock is called mafic, and contains a lesser amount of silica along with olivine, pyroxene, amphibole, biotite mica, and plagioclase feldspa

    Light coloured igneous rocks (felsic) tend to have greater silica and aluminum content and a lower iron and magnesium content than dark (mafic) rocks.
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