The shaping of a smooth, elongated hill of glacial till beneath moving ice, streamlined with its long axis parallel to the direction of ice flow and typically steeper on the up-ice end than the down-ice end. Drumlins commonly occur in swarms, or fields, and their orientation is used to reconstruct the flow direction of vanished ice sheets.
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1. Drumlin - Wikipedia
Morphology sectionQuote, Morphology section
A drumlin 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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