Glaciers ,the transitional beauty.

The moving ice mass downslope under the effect of gravity is called ice sheet. Around 10 percent of earth's surface is presently secured by ice sheets. Around 2-3 million years BP ice sheets stretched out over very nearly 33% of the world's lithospheric surface. Icy masses are shaped because of collection of ice above snow line under outrageous cold atmosphere. Snow line is commonly characterized as a zone among lasting and occasional day off. 

Truth be told, snow line signifies that tallness above which there is changeless snow spread and in this way it compares to the level where normal temperature is consistently beneath the point of solidification during the hottest month of the year. The snow line is at the most minimal tallness (0m or ocean level) in the polar district and builds equator ward where it will in general happen between 5000 to 6000m. 

The snow line is found at the most noteworthy height in the drier piece of the Tibetan level and Andes (6500m). The assessed number of a wide range of ice sheets everywhere on over the world extents somewhere in the range of 70,000 and 200,000. The regions of aggregation of gigantic volume of ice are called snow fields which create ice sheets of various measurements. 

The icy masses develop by progressive change of snow into granular day off, into firn or neve lastly into strong frosty ice. Snow is a cushy mass of approximately stuffed snowflakes of exceptionally low thickness having an open quill like appearance. 

Semi-compacted snow because of the heaviness of overlying snow is changed into granular snow of denser structure. Such granular snow is called firn or neve. Further compaction of granular snow produces unadulterated strong frosty ice.