Depressions in the ground known as kettles , formed as stranded ice blocks melted and the debris covering them subsided.
(the ground; known; as kettles) (Depressions in the ground known as kettles , formed as stranded ice blocks; subsided; ) (Depressions in the ground; formed; as stranded ice blocks) (stranded ice blocks; melted; ) (the debris; covering; them)
the ground Depressions in the ground known as kettles , formed as stranded ice blocks Depressions in the ground stranded ice blocks the debris
known subsided formed melted covering
as kettles
as stranded ice blocks
them