The following questions relate to magma of composition y in Figure 8.15(B). Figure 8.15(B). a) What mineral

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The following questions relate to magma of composition y in Figure 8.15(B). 


Figure 8.15(B).

B B Isobaric (B) C

a) What mineral first crystallizes from this magma? 

b) When the magma first arrives at the cotectic, what percentage of the magma has crystallized? 

c) When the magma first arrives at the eutectic, what percentage of crystals is present and what composition do they have?

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