Figure 10.43: An esker is a winding ridge of sand and gravel deposited under a glacier by
glacial meltwater. ( 45 )
marvins-underground-k-12
(Marvins-Underground-K-12)
#1
Figure 10.43: An esker is a winding ridge of sand and gravel deposited under a glacier by
glacial meltwater. ( 45 )