When ice fronts stagnate or retreat, some blocks of the ice may remain either partially submerged or fully buried below the surface. Kettles form when previously buried blocks of ice melt. A kettle, also called a kettle hole or a pothole, is a shallow depression that fills with glacial water in addition to water from other sources and has sediments.
Examples of fluvio-glacial features include kames, kettle holes, proglacial lakes, and outwash plains. The word fluvio refers to features that relate to water and glacial refers to features that are of ice origin, therefore, fluvio-glacial is the water that remains behind when glaciers melt. When glaciers melt and retreat, they leave landforms like kettles within the glacier or on the surface.
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