ENVS 2060 Lecture Notes - Lecture 5: Moraine, Lake Whittlesey, Soil Texture
31 Mar 2016
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Document Summary
Glaciers start in one area, gravity pushes down at the accumulation of ice in the middle, pushes the ice outwards and creates a larger sa, works towards low-lying areas. Ice is moving towards the front, but melting at a higher rate = retreating. Highest ground in southern ontario opened up irst: clay rich soil bringing sediment with it, water melting depositing into the soil. Delta (grand river) full of glacier water, sandy soils, fast moving water carries all but heavier materials with it, reaching delta (where river widens) the speed of water decreases, leaving iner sands behind. Salt water the exit to the ocean is cut of by glacial ice, trapping seawater there. Sodium-salt efected clay lida clays: poor structural stability. Stagnant zone (unless moving) rate of pushing forward = rate of melting: leaves topography really uneven, water erodes away and carries everything but the coarsest material. Soil texture is big rocks and coarse sand.
