A fjord is formed when:
- A.A river valley is drowned by a rise in sea level
- B.A glacial trough on the coast is drowned by the sea
- C.A coral reef encloses a shallow lagoon
- D.A volcanic crater fills with sea water
Show answer
A glacier moving to the coast deepens its valley below the level of the sea; when the ice melts, salt water enters the deep U-shaped trough and leaves a long, narrow, steep-sided inlet, the fjord, of which the coasts of Norway, Chile, Greenland and New Zealand give the best examples.
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