Formation of Fiords

- Initially, there existed a river valley in a mountainous region near the sea.
- The river valley had well-developed interlocking spurs.
- The entire river valley was covered with ice during the period of glaciation.
- The river valley was eroded through plucking and abrasion.
- The former interlocking spurs were trimmed through plucking and abrasion forming truncated spurs.
- Plucking process straightened and widened the river valley while abrasion greatly deepened it.
- The eroded materials were deposited towards the sea side.
- When ice melted, a wide, flat-bottomed valley with steep sides called a glacial trough was formed.
- When the sea level did rise, the entire glacial trough was submerged up to far inland forming an inlet called a fiord/fjord.