Glacial landforms part 2

Question 1

What is an esker?

Answer 1

sinious ridges made of sands and gravels, deposited by glacial meltwater flowing through tunnels within and underneath glaciers

Question 2

How are eskers formed?

Answer 2

1- subglacial stream forms due to increase pressure
2- channel carries sediment
3- when the glacier retreats the stream stops flowing
4- it then deposits all its material because it doesn’t have the energy
5- it gets dumped in a long line where the channel was

Question 3

What is a kame?

Answer 3

a deposited mound of sediment left in the path of a retreating glacier

Question 4

How are kames formed?

Answer 4

rocks from the valley fall onto the glacier, the rocks move down closer to the base of the glacier. Eventually, they are dumped onto the bed as a mound of sediment

Question 5

What is a kame terrace?

Answer 5

A deposited mound of sediment at the sides of the valley

Question 6

How are kame terrace formed?

Answer 6

forms due to differential specific heat capacity of valley and glacier, leading to supra-glacial streams which deposit material along the valley side

Question 7

What is a kame delta?

Answer 7

Kames that form in a proglacial lake

Question 8

How are kame deltas formed?

Answer 8

1- Subglacial channel is formed from pressure
2- it transports material downstream
3- it then looses energy and deposits the sediment