Answer:
Kettle.
Explanation:
A kettle is a geological and topographical phenomenon that has arisen where a large piece of a glacier has been lying around and surrounded by sediment that comes with the water from the glacier, which retreats. When the sediment first solidifies around the "ice cube" and this later melts away, it leaves the hole that forms the kettle. At the bottom of the depression there is usually a bog or marshland, but there is also open water.
