depositional landforms + how they are formed

Question 1

Lateral moraine - appearance + formation

Answer 1

• A ridge of moraine along the edge of the valley floor.
• exposed rock on the valley side is weathered and fragments fall down on to the edge of the glacier. This is then carried along the valley and deposited when the ice melts. Parallel to ice flow.

Question 2

Medial moraine - appearance + formation

Answer 2

• A ridge of moraine down the middle of the valley floor
• when 2 valley glaciers converge, 2 lateral moraines combine to form a medial moraine. material is carried and deposited when melting occurs. Parallel to ice flow.

Question 3

Terminal/end moraine - appearance + formation

Answer 3

• A ridge of moraine extending across the valley at the furthest point the glacier reached
• advancing ice carries moraines foward and deposits it at the point of maximum advance when it retreats. Th up-valley (ice contact) side is generally steeper than the other side as the advancing ice rose over the debris. Transverse to ice flow.

Question 4

Recessional moraine - appearance + formation

Answer 4

• a series of ridges running across the valley behind the terminal moraine
• each recessional moraine represents a still stand during ice retreat they are indicators of the cycle of advance and retreat that many glaciers experience, Transverse to ice flow.

Question 5

Push moraine - appearance + formation

Answer 5

• A ridge of moraine with stones tilted upwards
• Any morainic material at the glacier snout will be pushed foward during advance + retreat that many glaciers experience. Transverse to ice flow.

Question 6

Disintegration moraine - appearence +formation

Answer 6

• chaotic jumble of till mounds

- associated with active glacial retreat