GL 7

Question 1

Rapid Change:

Answer 1

Change occurring rapidly
Rockfall

Question 2

Randa Rockslide, Switzerland 1991

Answer 2

Three rockslides in less then one day, totalling 33million m3 of rock falling.
33 buildings destroyed
Dead livestock
Water Dammed

Question 3

Seasonal change:

Answer 3

Change due to seasons
Infilling of lakes, Varves

Question 4

Varves - Example

Answer 4

Nant Ffrancon Valley

Question 5

Long term change:

Answer 5

Post Glacial landscapes modified by water
Alluvial Fans
Infilling of Lakes
Misfit stream

Question 6

Alluvial fans formation

Answer 6

Streams flow downhill rapidly, carrying large amounts of sediment
Gradient changes, streams slow down and fan out, sediment is deposited in fan shape

Question 7

Alluvial fans Apex vs Apron

Answer 7

Apex - narrow top point
Apron - Wide triangle

Question 8

Alluvial fans - Example

Answer 8

Nant Ffrancon valley, streams exiting hanging valleys, Cwm Idwal

Question 9

Infilling of lakes - Long term change

Answer 9

Stream enters ribbon lake, velocity drops, stream load is deposited, infilling lakes

Question 10

Infilling of Lakes - Example

Answer 10

Nant Ffrancon Valley

Question 11

Misfit stream

Answer 11

At base of glacial trough
Cause vertical erosion, meandering, embankments and some interlocking spurs

Question 12

Misfit stream - Example

Answer 12

Afon Ogwen, Nant Ffrancon valley