As described above, hybrid margins can be temporally and spatially complex, which introduces a complexity to the study and reporting of deglacial history. As suggested above, example are found:
- In the Memphremagog Basin where the T5 active ice margin is mapped, showing that associated drainage came from remnant stagnant ice in the older T4 margin which was still developing as a stagnant ice margin.
- Along the foothills in the Champlain Basin in the Bristol to Williston areas associated with the drainage of Lake Mansfield and the opening of the Winooski Basin to Coveville Lake water, in conjunction with the destabilization and development of a calving ice margin when Lake Vermont lowered to the Fort Ann level. The evidence indicates that the active ice margin(which controlled drainage) receded so as to allow the drainage of Lake Mansfield and the invasion of Coveville Lake Vermont into the Winooski Basin, while the stagnant ice margin still extended southward along the foothills, suggesting that the stagnant ice margin was penetrated by standing water at the Coveville level, and as well subsequently associated with the Fort Ann level.
It is believed that all ice margins were hybrid types.