Fluvioglacial landforms

?
Name 3 ice contact features.
1) Kames and kettle holes 2) Eskers 3) Kame terrace
1 of 14
Describe a kame (and kettle holes).
Mounds and hillocks of till, with some evidence of meltwater flow; often found next to depressions called kettle holes which may form small ponds and pools
2 of 14
Describe an esker.
Long, thin, sinuous gravel ridges often extending hundreds of metres.
3 of 14
Describe a kame terrace.
Sediment 'benches' on valley sides representing the former ice surface and its contact with the valley wall.
4 of 14
How are kames (and kettle holes) formed?
Ice surface sediment is dumped as ice melts beneath it, and some reworking by meltwater occurs. Kettle holes are the depressions left as individual ice blocks melt.
5 of 14
How is an esker formed?
Formed in ice-walled englacial tunnels (deposited by the ice melts) or constrained subglacial streams.
6 of 14
How is a kame terrace formed?
Sediment seems to accumulate in ice-bound pools and exhibits stratification and is often well-sorted.
7 of 14
Name 3 proglacial landforms.
Sandhur, proglacial lake and meltwater channels.
8 of 14
Describe a sandhur.
A sandhur is an extensive, flat plain with numerous meltwater channels draining an ice mass.
9 of 14
Describe a proglacial lake.
A lake formed in a depression in front of an ice mass. They are often dammed by moraines.
10 of 14
Describe a meltwater channel.
Braided channels and meandering channels running across the surface of a sandhur.
11 of 14
How is a sandhur formed?
The dominant forces are river ones i.e. channel formation and deposition of sediment from river flow, although they are seasonal because of summer ice melt.
12 of 14
How is a proglacial lake formed?
Sediment settles in seasonal layers called varves on the lake bed, and exhibit grading.
13 of 14
How is a meltwater channel formed?
Formed by meltwater from the ice mass but more mobile than most river channels because of the lack of stabilising vegetation.
14 of 14

Other cards in this set

Card 2

Front

Describe a kame (and kettle holes).

Back

Mounds and hillocks of till, with some evidence of meltwater flow; often found next to depressions called kettle holes which may form small ponds and pools

Card 3

Front

Describe an esker.

Back

Preview of the front of card 3

Card 4

Front

Describe a kame terrace.

Back

Preview of the front of card 4

Card 5

Front

How are kames (and kettle holes) formed?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Geography resources:

See all Geography resources »See all Glaciated Landscapes resources »