Rejuvenation

Question 1

What is rejuvenation? (Rejuvenation rivers)

Answer 1

The renewal of a rivers energy in response to a relative fall in base level (sea level change)

Question 2

What is eustatic change encouraged by? (Rejuvenation rivers)

Answer 2

• Thermal expansion (global warming)
• Glacier periods (water locked as ice sheets)
• Interglacial periods (melting glaciers)

Question 3

What is a kick point? (Rejuvenation rivers)

Answer 3

• The river has created a newly graded profile to adjust to the new base level
• Identified by a break in slope
• Vertical erosion

Question 4

What is a river terrace? (Rejuvenation rivers)

Answer 4

• Remains of the former flood plain
• Abandoned as the river has eroded too deeply to access it
• New floodplain is created either side be neither original

Question 5

What types of incised meanders are there? (Rejuvenation rivers)

Answer 5

Entrenched and ingrown

Question 6

Why do incised meanders form? (Rejuvenation rivers)

Answer 6

Increase in the rates of vertical erosion, more deep set

Question 7

How does an entrenched meander form? (Rejuvenation rivers)

Answer 7

Rapid and equal rates of erosion leaves a clear symmetrical cross section

Question 8

How does an ingrown meander form? (Rejuvenation rivers)

Answer 8

Vertical and lateral erosion occurs at differing rates, resulting in an asymmetrical cross section

Question 9

What landforms result from rejuvenation? (Rejuvenation rivers)

Answer 9

kick point
river terrace
incised meanders