Glacial Processe2

Glacial Processe2 - Glacial Processes Glacier a body of...

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Glacial Processes Glacier a body of land ice that moves forms from the metamorphosis of snow: new snow (.01-.3 gm/cc) to firn, snow that has survived a melt season, (.55 gm/cc) to ice (.89-.92 gm/cc) rate of transformation from firn to ice depends on temperature, from about 50 years in humid temperate climates ( e.g. coastal mountains) to 100s of years in cold dry climates Distribution of glacier ice about 10% of the earth's land surface 96% currently is in two glaciers, the Greenland and Antarctic ice sheets during the Pleistocene glaciation, up to 30% of the earth's land surface was covered with glacier ice thus many of the mid- to high-latitudes landforms of the world, especially in the northern hemisphere, are glacial in origin Classification of glaciers, according to 1. morphology a. niche smallest glaciers from in hollows, benches or from avalanche snow often hanging on a cliff b. cirque cirque have a morphology that favours the accumulation and persistence
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Glacial Processe2 - Glacial Processes Glacier a body of...

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