GL 7 Flashcards

1
Q

Rapid Change:

A

Change occurring rapidly
Rockfall

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2
Q

Randa Rockslide, Switzerland 1991

A

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

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3
Q

Seasonal change:

A

Change due to seasons
Infilling of lakes, Varves

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4
Q

Varves

A

Nant Ffrancon Valley

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5
Q

Long term change:

A

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

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6
Q

Alluvial fans formation

A

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

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7
Q

Alluvial fans Apex vs Apron

A

Apex - narrow top point
Apron - Wide triangle

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8
Q

Alluvial fans - Example

A

Nant Ffrancon valley, streams exiting hanging valleys, Cwm Idwal

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9
Q

Infilling of lakes - Long term change

A

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

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10
Q

Infilling of Lakes - Example

A

Nant Ffrancon Valley

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11
Q

Misfit stream

A

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

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12
Q

Misfit stream - Example

A

Afon Ogwen, Nant Ffrancon valley

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