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Eustatic changes
Eustatic changes refer to worldwide shifts in sea level caused by changes in the volume of water in the oceans or alterations in the size of the ocean basins.
Fjord
A fjord is a long, narrow, steep-sided sea inlet formed when rising relative sea level floods a deep U-shaped valley eroded by a glacier.
Isostatic changes
Isostatic changes involve vertical movements of the Earth's crust relative to the sea.