collapsed ice-floored lakebed


collapsed ice-floored lakebed
   A lakebed formed in a lake on glacial ice and subsequently "let down" or collapsed by the melting of underlying ice, resulting in contortion or folding of the lacustrine sediment and sedimentary structures. These modified or distorted lacustrine sediments cap present-day topographic highs and generally lie at elevations higher than the surrounding disintegration moraine.
   SW & CF

Glossary of landform and geologic terms. 2013.

Look at other dictionaries:

  • collapsed ice-walled lakebed —    A lakebed that formed in a lake bounded by stagnant ice, but floored by solid ground, usually till. Collapse features are limited to the lakebed margins. Presently, these materials and sedimentary structures generally occur as roughly circular …   Glossary of landform and geologic terms

  • elevated lake plain —    (not preferred)    refer to collapsed lake plain, collapsed ice floored lakebed …   Glossary of landform and geologic terms