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4. Coasts <strong>and</strong> Sea Level Change• Isostasy: A state of balance that is maintained in the crust of the earth.Fluctuations in this balance cause isostatic movements which act to restorethe balance (eg: glacial isostacy).• Eustasy: A global change of sea-level resulting from a rise or fall of waterlevel as opposed to a change in the level of the l<strong>and</strong>.
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