Quiz 8- Ch 5 Bowen

Question 1

Magmatic Differentiation

Answer 1

rocks of varying composition arise from a uniform parent magma

Question 2

Fractional Crystallization

Answer 2

the process by which crystals in a cooling magma are separated from the remaining liquid

Question 3

Why is there so much granite?

Answer 3

1. rocks from the upper mantle might partially melt to form basaltic magmas
2. Mixtures of sedimentary and oceanic rocks (subduction zones) might melt to form andesitic rocks
3. Mixtures of sedimentary, igneous, and metamorphic continental crustal rocks might melt to produce granitic magmas.