Erosion landforms.

Question 1

Corries.

Answer 1

• North (UK), South (below the equator) facing slope.
• Snow accumulates in the hollow.
• Nivation occurs (freeze thaw and chemical weathering) deepens the hollow.
• Snow compacts and creates a glacier.
• Rotational slip causes the glacier to move.
• Plucks rocks from the back wall of the glacier.
• Rocks plucked away end up in the glacier and process of abrasion occurs.
• Deepens the hollow into an armchair shape.

Question 2

Arete.

Answer 2

• North (UK), South (below the equator) facing slope.
• Snow accumulates in the hollow.
• Novation occurs (freeze thaw and chemical weathering) deepens the hollow.
• Snow compacts and creates a glacier.
• Rotational slip causes the glacier to move.
• Plucks rocks from the back wall of the glacier.
• Rocks plucked away end up in the glacier and process of abrasion occurs.
• Deepens the hollow into an armchair shape.
• Two corries back to back create a knife ridge edge.

Question 3

Pyramidal peak.

Answer 3

• North (UK), South (below the equator) facing slope.
• Snow accumulates in the hollow.
• Nivation occurs (freeze thaw and chemical weathering) deepens the hollow.
• Snow compacts and creates a glacier.
• Rotational slip causes the glacier to move.
• Plucks rocks from the back wall of the glacier.
• Rocks plucked away end up in the glacier and process of abrasion occurs.
• Deepens the hollow into an armchair shape.
• 3 or more corries back to back create a pyramidal peak.

Question 4

Glacial trough.

Answer 4

• Originally a v-shaped valley with a meander in it.
• With interlocking spurs.
• Snow accumulation throughout the valley which compacts into a glacier.
• As the glacier moves through the valley plucking and abrasion occurs removing the interlocking spurs.
• Leaving a U-shaped valley known as a glacial trough.
• Ribbon lakes and misfit stream: left over meltwater.