| Term: | Grounding line |
| Definition: | The junction between a glacier or ice sheet and ice shelf; the place where ice starts to float. This junction normally occurs over a finite zone, rather than at a line. |
| Term: | Grounding line |
| Definition: | The set of points separating the floating part of a glacier from the grounded part. See flotation. Usually the floating part is downstream and the grounded part is upstream. However, the 'shorelines' of subglacial lakes are grounding lines. |