Definitions for kettle hole
Random House Webster's College Dictionary
a deep, kettle-shaped depression in glacial drift.
Ref: pothole (def. 2). 3
Origin of kettle hole:
kettle hole, kettle(noun)
(geology) a hollow (typically filled by a lake) that results from the melting of a mass of ice trapped in glacial deposits
A depression in the ground occurring as the result of a large block of ice getting buried by glacial outwash and subsequent melting of it.