Context of relict Wisconsinan glacial ice at Angus Lake, SW Banks Island, western Canadian Arctic and stratigraphic implications

Massive ice incorporating till beds and scattered erratic clasts exposed in a bimodal thaw slide displayed an association with the surrounding fluviog lacial and flow-till facies indicative of a consanguineous relationship. Th e massive ice cores a low ridge interpreted as a recessional moraine featur e paralleling the Last Glacial Maximum advance limit. Both ice and sand wed ges penetrate the massive ice and their tops are truncated by a thaw unconf ormity overlain by a diamicton. In a permafrost environment, relict glacial ice can persist for many millennia, and the timing of the thaw is largely determined by the vagaries of erosional processes. The age of related kettl e landforms can display considerable diachronism.