Glaciation Formations

Question 1

Corrie

Answer 1

-Explain how a glacier forms and moves

-Explain processes

-Bwrgshrund forms where the glacier moves away from the Backwall and creates a gap. Rocks can get trapped here and cause more abrasion.

-As the glacier moves downhill, it flows with a rotational movement. This causes more erosion at the back and less erosion at the front, creating a lip and the corrie is deepened

-A tarn can form in the hollow due to the glacier melting and leaving behind a lake

-A corrie has formed and is shown as an armchair shaped hollow on the North side of a mountain

Question 2

Arete

Answer 2

-Explain how a glacier forms and moves

-Explain processes

-Explain how a corrie forms

-An arete will form when there are two or more corries back to back and only a knife edge ridge separates the two

-The ridge becomes sharper and steeper through freeze thaw

Question 3

Pyramidal Peak

Answer 3

-Explain how glaciers form and move

-Explain processes

-Explain formation of a corrie

-These form when three or more corries are back to back

-Freeze thaw at the peak makes it very sharp

Question 4

U-Shaped Valley

Answer 4

-Explain how a glacier forms and moves

-Explain processes (plucking and abrasion)

-Snow can gather in a v-shaped valley or the glacier can move down from a corrie through the valley

-The glacier will bulldoze its way through interlocking spurs, eroding them, and they become truncated spurs

-When the glacier reaches lower altitudes, the temperature is warmer, therefore the glacier will melt

-The glacier will retreat (melt from the snout), leaving behind a u-shaped valley with steep sides and wide, flat and smooth valley floor

Question 5

Ribbon Lake

Answer 5

-Explain how a glacier forms and moves

-Explain processes

-Explain a u-shaped valley

-Where there are bands of hard and soft rock on the floor of the u-shaped valley, a ribbon lake can form

Question 6

Hanging Valley

Answer 6

-Explain how a glacier forms and moves

-Explain processes

-Explain a u-shaped valley

-Hanging valleys form where a glacier flows through a tributary valley, carves out the landscape, and meets the main valley, high up on the side of the u-shaped valley