Geography, 12.06.2020 04:57 gobertbrianna40
Zoom in and look at Sample F in detail. This igneous rock contains at least 50% of a dark greenish grey mineral that has been identified as calcium rich plagioclase. There is also about an equal amount of a dark greenish black mineral that forms a texture of interlocking crystals with the plagioclase. Thinking of Bowen's Reaction Series, the dark greenish black mineral would most likely be .
a. pyroxene (augite)
b. amphibole (hornblende)
c. biotite
d. muscovite
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Zoom in and look at Sample F in detail. This igneous rock contains at least 50% of a dark greenish g...
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