StoneGloves wrote:
Yes, but ... If you consider it logically, then a pit eroded by a stone being rotated beneath a flowing glacier can never become deeper than it is wide.
The weight of the glacier could be enough to press down sufficiently to make the eroded hole slightly deeper than the trapped stone is high. But not by much. Glaciers are odd things with odd physics, because (if I remember correctly) they almost behave like liquids when they move.