Magmatic Differentiation Flashcards
1
Q
Fractional crystallisation
A
When early forming minerals use up iron, magnesium and calcium leaving magma depleted in these elements. Over time the composition of the magna chamber changes
2
Q
Gravity settling
A
Crystals formed are denser than the liquid so settle out and form a layer at the base of the chamber, forming a cumulate layer.
3
Q
Filter pressing
A
Weight of crystals caused liquid to get squeezed out, forming a separate layer above
