glacial deposition - landforms

Question 1

lateral moraine

Answer 1

deposited where the sides of the glacier once were
much of the moraine will have freeze thaw weathering acting on the valley sides

Question 2

medial morraine

Answer 2

the medial morraine is deposited in the centre of the valley where two glaciers meet/converg
medieal morraine is two lateral moraines joined together, made from weathered material of the valley sides.
its found in lines parallel to the ice flow

Question 3

terminal moraine

Answer 3

• builds up at the end of the glacier in semi-circular hillocks of till
• it is highly likely that streams of meltwater will have cut the semi-circle into a series of hills
• ## these hills will be steeper on the upglacier side as the glacier woulf have deposited more material there once the hill had started to fomm

Question 4

recessional moraine

Answer 4

• Recessional Moraine: A ridge of glacial debris left behind during pauses in a glacier’s retreat.
• Location: Forms behind the terminal moraine (the furthest point the glacier reached).
• Formation: shows the movement of the glaciers snout as it stops and deposits debris while retreating up the valley, leaving multiple ridges of glacial till

Question 5

drumlinnnn

Answer 5

area previously covered in ice
- can be 1500m long and 100m high
- have parralel orientation to the directio of glacial flow
- they occer in large clusters known as swarms
- the upglacier (stoss) end is wide and tall
- the downglacier (lee) is narrow and low

Question 6

how drumlin was formed

Answer 6

• drumlin might start forming when till (glacial debris) collects around a rock or small hill sticking up at the glacier’s base.
• When the glacier re-advances over this mound, it pushes and smooths the till around the obstacle, creating a streamlined, elongated shape.
• The steep end of a drumlin faces the direction the glacier came from (stoss side), while the gentler slope points in the direction the glacier was moving (lee side).