examples of shorelines
Shoreline: strip of land where the sea meets the land.
shore cliff 
Steep rock-faced shoreline shaped by the sea.
fjords 
Deep glacial valleys filled with seawater and cutting into the shoreline.
barrier beach 
Usually narrow ridge of sand or pebbles bordering the shoreline.
delta 
Section of the coastline where sediment builds up at the mouth of a river, divided into several arms.
atoll 
Ring-shaped coral-reef island enclosing a lagoon and often a central island.
lagoon 
Shallow expanse of water separated from the sea by a coral reef.
rias 
Coastal valleys that are filled by the sea and get shallower inland.