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drumlin


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A long hummock or hill, egg-shaped in plan, and deposited and shaped under an ice sheet or very broad glacier, while the ice was still moving. The stoss is blunt, while the lee is shallow, with its point indicating the direction of ice flow. Drumlins have been formed via a variety of mechanisms; see Clarke et al. (2005) Q. Sci. Revs 24. Drumlin swarms, or drumlin fields are not uncommon. Briner (2007) Boreas 36, 2 argues that the bedforms in the New York drumlin field indicate fast ice flow. Rock drumlins are more commonly known as roches moutonnées.

Subjects: Earth Sciences and Geography.


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