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22 Cards in this Set

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Glaciers
large, long lasting river of ice made of compressed recrystallized snow
albedo
reflecting power of a surface.
zone of ablation
Processes of ablation (where ice is lost) include melting, evaporation, iceberg calving, and sublimation.
PROPERTIES OF ICE
less dense than water

floats, expands, slippery
Moraines
deposition of till that marks the former position of a glacier
Striations
glaciers scrape clean al soil to bedrock and leave scratches
Mountain Glaciers
Form in mountains and flow down valleys
Continental glaciers
covers whole continent
U-shape Valleys
Glacial valley
Cirque
bowl shape, may have small lake
Tarn
formed in a cirque excavated by a glacier
lateral moraine
deposits of till marking edge of glacier against valley wall
medial moraine
two valley glaciers coalesce, till marks boundary between two
terminal moraine
deposition of till to mark the line of its farther advance
hanging valley
when a tributary glacier flows into a glacier of larger volume
arete
two glacial valleys carve out a sharp ridge line
horn
two cirques carve out a horn
ground moraine
flat deposit below moving ice
drumlin
when land surface is molded into smooth elongated forms by glacier
kettle lake
glacier recedes, leaves chunk of ice, till piles up around ice, ice melts, leaves kettle pond
erratic
blocks of bedrock with foreign lithology that have been deposited by meting ice
esker
ling sinuous ridges of sand and gravel deposited by streams that ran under/within glaciers