River Terraces (Rejuvenation) Flashcards
1
Q
How are river terraces formed?
A
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. The terraces are cut back as the new valley is widened by lateral erosion.
2
Q
What happens if renewed rejuvenation occurs?
A
The process is repeated and a new pair of river terraces are formed beneath the original ones.
3
Q
What is a river terrace?
A
A remnant of a former floodplain, which has been left at a higher level after rejuvenation of the river.
