glacial transportation and depositional landforms

Question 1

What is moraine

Answer 1

landforms that are left behind after a glacier melts. They are made of till and their position determines which of the four types a particular landform is

Question 2

What are the five types of moraine

Answer 2

ground, lateral, medial, terminal, recessional

Question 3

lateral moraine

Answer 3

when an extended mound of till is deposited at sides of glaciers, made of scree from valley edge

Question 4

medial moraine

Answer 4

tributary glacier joins a smaller one, two lateral moraines merge into one. Ice melts and forms a ridge in the middle

Question 5

ground moraine

Answer 5

material dragged underneath glacier that’s left behind when it melts

Question 6

terminal moraine

Answer 6

huge amounts of material built up at the end of the glacier marking maximum extent of ice coversge

Question 7

recessional moraine

Answer 7

marks where glacier once was as it retreats material is deposited

Question 8

What are erratics

Answer 8

rocks that have been transported by ice and deposited elsewhere, the type of rock is different to the lithology of the bedrock where the erratic is deposited. Help to identify where i’ve came from

Question 9

What are drumlin’s

Answer 9

small egg shaped hills of glacial deposition.

Question 10

features of drumlin’s

Answer 10

steep stoss side, gentle lee side, they can become 1km+ in length, 500m in width and 50 m in height

Question 11

how are drumlin’s formed

Answer 11

when glacier is carrying material it struggles to carry it all as it starts to melt. Small obstacles have moraine deposited around them. Moraine moulds itself around obstacle. When ice sheet moves over material is shapes it, depending on direction of ice flow