Glacial meltwater landforms/landscapes

Question 1

How does meltwater move throughout a glacier

Answer 1

Meltwater streams
Discharge is variable with conditions and seasons

Question 2

What is fluvio-glacial

Answer 2

Refers to erosion of deposition caused by meltwater

Question 3

What happens when temperatures drop in meltwater streams

Answer 3

Fluvio-glacial deposition occurs

Question 4

What are the characteristics of till and fluvio-glacial deposits x4

Answer 4

Clast shape
Imbrication
Stratification and grading
Sorting

Question 5

What is till

Answer 5

Deposits of angular rock (clasts) in finer matrix unstratified (not layered) unsorted (mixture of clast sizes) and erractics (mixture of geology)

Question 6

What is clast shape

Answer 6

Rock fragments
They are either angular or smooth/round

Question 7

What is imbrication

Answer 7

The preferred orientation and dip caused by a current

Question 8

What is stratification and grading

Answer 8

Deposits are layered with coarse sediments at the bottom and grading upward into finer sediments

Question 9

What is sorting

Answer 9

Sorted sediment has a common grain size

Question 10

The characteristics of till and fluvio-glacial deposits (differences)
Clast shape

Answer 10

Till- clasts frozen to ice, limiting movement and maintain angular shape

Fluvio-glacial debris- attrition in meltwater causes the clasts to be more round