Table 21-1: TABLE 21-1: Types of Glacial Moraines
Type of MoraineLocation with Respect to Ice FrontComments
End moraineAt ice frontAfter glacier melts, seen as ridge parallel to former ice front
Terminal moraineAt ice front marking farthest advance of iceType of end moraine
Lateral moraineAlong edge of glacier where it scrapes side walls of valleyHeavy sediment load eroded from valley walls; when ice melts, seen as ridge parallel to valley walls
Medial moraineFormed as two joined glaciers merge their lateral moraines below junctionInherits its sediment load from lateral moraines that formed it; forms ridge parallel to valley walls
Ground moraineBeneath the ice as a layer of glacial debrisRanges from thin and patchy to a thick blanket of tills