As mentioned above, proglacial waters tend to penetrate ice margins, resulting in narrow, more or less open water corridors. In the discussion below about Ice Tongue Grooves in the Lamoille Basin, based on descriptions in the literature associated with destabilized margins, reference is made to “Disaggregated” ice, a term introduced in recent literature. It is believed that stagnant ice margins generally were highly crevassed so as to allow for standing and flowing water penetration. These water penetrated ice margins likely were “Disaggregated,” which as noted above speaks to the power of standing water along ice margins. This is evident in the Memphremagog Basin at the T5-T6 ice margins, which are marked by kame deltas at the proglacial Lake Memphremagog level interspersed with and closely associated with stagnant ice deposits and large ice blocks as marked by many kettle holes with substantial width and depth. It is also part of the story with both the eastern and western margins of Lake Winooski. And it is part of the story of the development and progressive northward expansion of a narrow standing water corridor along the eastern margin of the Champlain Basin.