题目内容
A/an is an elongated hill in the shape of an inverted spoon or half-buried egg formed by glacial ice acting on underlying unconsolidated till or ground moraine.
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An/a is a long, winding ridge of stratified sands and gravels deposited by subglacial meltwater streams, occurred in glaciated and formerly glaciated regions of northern hemisphere.
Glacial striations are scratches or gouges cut into bedrock by glacial abrasion.
Which of the following landforms is not formed by glacial erosion?
A(n) ________ is a sharp, knife-edged ridge that forms between two valley glaciers.
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