ISOSTATIC SUBSIDENCE
- ice on land is heavy, during glacial period land may sink due to weight
- when ice melts, weight is removed, causing land to rise + recover \= relative fall in sea level.
TECTONIC PROCESSES
- can cause land to rise/fall
- e.g. 2004 earthquake, crust sank, sea level rose 0.1mm permanently.
SEDIMENT LOADING
- sediment pouring into an estuary from a river can be deposited, causing extra weight to push down on the land.