The formation of a depression, often later filled by water, where a block of glacial ice becomes buried in outwash sediment and then melts, leaving the surrounding sediment to slump into the resulting hollow. Kettle lakes dot many formerly glaciated outwash plains, including much of the northern United States and Canada.
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1. Kettle (landform) - Wikipedia
Overview sectionQuote, Overview section
The kettles are formed as a result of blocks of dead ice left behind by retreating glaciers, which become surrounded by sediment deposited by meltwater streams as there is increased friction.
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