FRACTIONAL CRYSTALIZATION /

PARTIAL MELTING

AS MAGMA COOLS THE SOLID MINERALS THAT "FREEZE" OUT DIFFER IN COMPOSITION FROM THE LIQUID REMAINING

THUS AS A MAGMA COOLS THE MINERALS FORMED DEPEND ON TEMPERATURE

("FRACTIONAL CRYSTALIZATION")

THE REVERSE PROCESS OCCURS DURING MELTING

("PARTIAL MELTING")

THIS PROCESS CAN BE ILLUSTRATED WITH HALF-FROZEN APPLE JUICE AND OTHER FAMILIAR FLUIDS