de Geer moraine

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A type of moraine landscape that consists of a series of separate, narrow ridges trending parallel to a former ice front, and which can form annually. The ridges may be up to 300 m apart and up to 15 m high. They consist typically of a till core, capped by a layer of partly rounded boulders. This landscape may have formed beneath the grounded part of an ice sheet that extended into a lake or sea. It is named after the Swedish geologist Baron Gerard de Geer (1858–1943).

Subjects: Ecology and Conservation — Earth Sciences and Geography.

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