Depositional Landforms

Question 1

Drumlins

Answer 1

Streamlined mounds of till deposited by glacier varying in size

Formed wnen a glacier moves over an existing moraine and compacts it, then creates the lee slope as it advances/ retreats

Question 2

Erratics

Answer 2

Singular, irregularly shaped boulders dropped by a melting glacier

Question 3

Lateral moraine

Answer 3

Ridge of till along valley floor, built up at side of glacier

Question 4

Medial moraine

Answer 4

Ridge of till down middle of valley formed when two glaciers come together
(Two lateral moraines of different glaciers coming together)

Question 5

Terminal moraine

Answer 5

Shows furthest advance of glacier extending across valley floor

Question 6

Features of moraine

Answer 6

Unconsolidated, angular, and unsorted sediment

Question 7

Lowland depositional features

Answer 7

Till plain- An extensive flat plain of glacial till that forms when a sheet of ice becomes detached from the main body of a glacier and melts in place

Lodgement- Till becomes forced into bedrock at base of glacier

Ablation till- Unsorted, coarse material deposited as a glacier melts

Question 8

How do drumlins show movement?

Answer 8

Drumlins are able to show direction of movement as the lee slope runs parallel with movement direction

Question 9

How do moraines form?

Answer 9

When there is a steady supply of debris to the snout of the glacier, allowing the moraine to build and eventually be deposited