Climate-driven thaw of permafrost preserved glacial landscapes, northwestern Canada

Ice-marginal glaciated landscapes demarcate former boundaries of the continental ice sheets. Throughout circumpolar regions, permafrost has preserved relict ground ice and glacigenic sediments, delaying the sequence of postglacial landscape change that transformed temperate environments millennia earlier. Here we show that within 7 × 10 6 null km 2 null of glaciated permafrost terrain, extensive landscapes remain poised for major climate-driven...