Formation of an Esker Flashcards
1
Q
what is an esker
A
Eskers are meandering ridges formed by meltwater streams in or under a glacier
2
Q
what are they made of
A
they are made of meltwater, sands and gravels which are sorted with largest at the base as these are dropped off first by the flowing water
3
Q
rounded stones
A
the stones also tend to be round as the flowing water rounds them by erosion
4
Q
glacier melts
A
as the glacier melts, sub-glacial streams flow through tunnels and the load is deposited on the channel bed
