Formation of a Corrie Flashcards
1
Q
Stage 1 - Before Glaciation
Corries usually form a north-facing slope, TMT
A
the sun won’t shine on the snow, TMT it won’t melt.
2
Q
More snow gathers + pressure builds up TMT
A
the air is squeezed out of the bottom layers creating Nêve.
TMT a glacier is formed causing erosion.
3
Q
Stage 2 - During Glaciation
The ice melts under gravity TIDT
A
melted water lubricating between between ice + rocks.
4
Q
This allows plucking to happen TMT
A
the back wall becomes steeper
5
Q
Abrasion also occurs TMT
A
the rock basin is deepened
6
Q
Freeze thaw action will occur TMT
A
water gets into rocks cracks freezes and expands meaning the back wall is weakened by big rocks.
7
Q
Stage 3
A rock lip is formed when the glacier looses its energy from melting TMT
A
a lochan gets trapped behind it
