(Solved): The salmon pink mineral in both the granite \& rhyolite pictured has striations, and when you look ...

The salmon pink mineral in both the granite \& rhyolite pictured has striations, and when you look at the crystals poking out of the side of the granite you see 2 directions of cleavage at \( 90^{\circ} \). What is this mineral? a) Quartz b) Biotite c) Microcline (K-feldspar) d) Augite Andesite forms from what type of magma? a) Mafic b) Intermediate c) Felsic d) Ultramafic