Glaciation: Formation of an Esker Flashcards
1
Q
What are Eskers made up of & how is their material sorted?
A
Eskers are made up of meltwater sands and gravels. Their material is sorted by size.
2
Q
What are Eskers?
A
Eskers are meandering ridges formed by meltwater streams either within or underneath the glacier.
3
Q
Which size of stones are deposited first?
A
The larger stones are deposited first by flowing water.
4
Q
What do the stones in Eskers look like?
A
The stones tend to be more rounded because the water rounds the edges through erosion.
5
Q
What happens to Eskers when the temperature rises?
A
When temperatures rise, the glacier melts and sub-glacial streams flow through tunnels and the sediment is deposited on the channel bed.
