collapsed outwash plain

collapsed outwash plain
   An outwash plain which forms on glacial ice (inside the glacial margin), and is subsequently let down or collapsed when the underlying ice melts, resulting in contortion or folding of the sediments and sedimentary structures to the extent that little of the original plain or its gradient remain. Outwash sediments commonly cap present-day topography.
   SW & CF

Glossary of landform and geologic terms. 2013.

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