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     The moving ice mass downslope under the impact of gravity is known as Glacier. These are formed due to the accumulation of ice under extreme cold conditions of climate. About 10% of earth's surface is now covered by glaciers.
Types of Glaciers
Ice Sheets: The biggest glaciers on the earth's land surface are called Ice sheets and covers 1000's of sq. kilometres.
Ice caps: Dome - shaped ice masses spreading over not more than 50,000 km2 is called ice cap. The central part of an ice cap is called Ice dome.
Ice Field: Ice field is comparatively flat and extensive mass ice sheets.
Ice Shelf: Ice Shelf is a floating thick ice sheet or ice cap attached to the coast. These can spread freely and are abundantly found along the Antarctic coasts.
Cirque Glacier: The ice occupying an arm-chair shaped cirque in the mountain is called cirque glacier.
Piedmont Glacier: Glaciers formed due to merging of several mountain or valley.
Mountain or valley glaciers: The body of ice moving down slope under the impact of gravity through the valley bordered by rock valley walls in the mountains is called mountain glacier or valley glacier.
* The length of these glaciers ranges from a few kilometres to 2000 kms.
Hanging valley Glaciers: The valleys of tributary glaciers which join the main glacial valleys of much greater depth are called Hanging valleys.
* These are found only those areas where tributary glaciers originate from higher height than the main glacier.
U - Shaped valleys glaciers: A valley which has been glaciated takes a characteristic
U - Shape, with a wide, flat floor and very steep sides and after the disappearance of the ice, these troughs may be filled with water forming ribbon lakes.
Rock basins and Rock Steps: Rock basins are formed due to unequal excavation and later filled by lakes in the valley trough.
* Rock Steps are formed due to different degrees of resistance to glacial erosion of the bedrocks.
Moraines: Moraines are ridge-ike depositional features of glacial tills. They are long but narrow ridges with height more than 30 m.

Posted Date : 15-10-2022

గమనిక : ప్రతిభ.ఈనాడు.నెట్‌లో కనిపించే వ్యాపార ప్రకటనలు వివిధ దేశాల్లోని వ్యాపారులు, సంస్థల నుంచి వస్తాయి. మరి కొన్ని ప్రకటనలు పాఠకుల అభిరుచి మేరకు కృత్రిమ మేధస్సు సాంకేతికత సాయంతో ప్రదర్శితమవుతుంటాయి. ఆ ప్రకటనల్లోని ఉత్పత్తులను లేదా సేవలను పాఠకులు స్వయంగా విచారించుకొని, జాగ్రత్తగా పరిశీలించి కొనుక్కోవాలి లేదా వినియోగించుకోవాలి. వాటి నాణ్యత లేదా లోపాలతో ఈనాడు యాజమాన్యానికి ఎలాంటి సంబంధం లేదు. ఈ విషయంలో ఉత్తర ప్రత్యుత్తరాలకు, ఈ-మెయిల్స్ కి, ఇంకా ఇతర రూపాల్లో సమాచార మార్పిడికి తావు లేదు. ఫిర్యాదులు స్వీకరించడం కుదరదు. పాఠకులు గమనించి, సహకరించాలని మనవి.



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