land's surface ??? ??? ??? eskers long, winding ridges of sand and gravel deposited by streams that flows in or under glaciers ??? ??? ??? glacial till rocks and material left behind by a glacier ??? ??? ??? moraine new landform crated by the accumulation of rocks, soil, and other debris carried and deposited by a glacier (glacial till) ??? ??? ??? cirque bowl-shaped valley with steep walls on a