The southern Laurentide Ice Sheet

摘要: Publisher Summary This chapter discusses the advances in understanding of southern Laurentide Ice Sheet (LIS) and its deposits since publication Quaternary United States 1965. The late Wisconsin LIS consists thin, gently sloping lobes with low-driving stresses. southernmost have a wet bed to margin surges are probably common. lowlands may be fed by ice streams. Not until after glacial maximum does warm margin. There profound differences distribution character landforms, such as moraines, drumlins, tunnel channels, likely subglacial processes, soft-deforming occurring places sliding dominating others. extent early mid-Wisconsin is now thought been less extensive than previously interpreted. A wide array global climate records shows that responds changes also cause because discharges melt water icebergs into North Atlantic.