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Details Title: glaciers Description: all about glaciers Total Flash Cards: 27 Created: 05/04/2008 19:45:40	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term Moraine Definition a pile of debris that has been transported and deposited by a glacier Term Esker Definition a ridge of sorted sediment and gravel deposited in sub-glacial melt water tunnels Term Kettle Lakes Definition water filled depression left by a glacial ice block Term Erratics Definition boulders left on the surface Term Drumlins Definition elongated hills formed when a glacier overrides a glacial till Term Outwash Plains Definition sand and gravels deposited by glacial melt water Term Horn Definition a pyramid-like peak formed by glacial action in 3 or more cirques surrounding a mountain summit Term Aretes Definition a narrow, knifelike ridge separating 2 adjacent glaciated valleys Term Hanging Valley Definition a tributary that enters a glacial trough high above the floor of the trough Term Truncated Spurs Definition eroded triangular shaped cliffs in glaciated valleys Term Tarn Lakes Definition a small lake in a cirque Term Cirque Definition an amphitheater-shaped basin at the head of a glaciated valley Term U-Shaped Valley Definition glacial trough Term Till Definition material depostited directly by the glacier Term Sorted Sediment Definition material laid down by glacial melt water Term Glacier Definition - A thick ice mass that originates on land from the accumulation, compaction, and recrystallization of snow Term Mountain Glacier Definition Smaller than continental, covers only a small region, lengths greater than widths Term Continental Glacier Definition Covers 10% of earth’s land, bigger than mountain glaciers Term Internal Movement Definition rotation of grains, slipping along weak surfaces, melting and refreezing Term External Movement Definition basal slip (slipping on a layer of water between the ice and bedrock) Term Mountain Glaciers Definition tend to accentuate the landscape Term Continental Glaciers Definition Tend to subdue the landscape Term Wisconsinan Illinoian Pre-Illinoian Definition stages of glaciation in illinois Term The North Definition where glaciers advance from Term Eccentricity of orbit Changes in earth’s tilt Precession of the equinoxes Definition the 3 parts of Milakovitch's Theory Term Areas where the summer climate is too cold for all the snow to melt Definition this is where glaciers form Term The middle of the glacier Definition where within the glacier the movement is faster