How Do We Know That the Initial Composition of the Melt

question 3

Multiple Choice

How do we know that the initial composition of the melt that the Palisades sill was mafic?

• A)There is basalt in the contact zone where the melt chilled.
• B)The sill material contains feldspar.
• C)The sill material contains pyroxene.
• D)The magma in sill underwent fractional crystallization.

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