River Terraces (Rejuvenation) Flashcards Preview

Geog Revision River Landforms > River Terraces (Rejuvenation) > Flashcards

Flashcards in River Terraces (Rejuvenation) Deck (5)
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1

How is a river terrace formed

Where a river renews its downcutting, it sinks its new channel into the former floodplain, leaving the old floodplain above the level of the present river.

2

What happens to river terraces over time

They are cut back as the new valley is widened by lateral erosion. If renewed rejuvenation takes place, the process is repeated and a new pair of terraces is formed beneath the original ones.

3

Example of a river terrace

The river thames has created terraces in its lower course by several stages of rejuvenation.

4

Why can river terraces be useful

They provide shelter from floods in a lower course valley, and natural route ways for roads and railways

5

What is a river terrace

A remnant of a former floodplain, which has been left at a higher level after rejuvenation of the river.