At the other end of a glacier, in the cwm where the ice is forming, the 'bowl' of ice rotates slowly, causing erosion beneath it. As the ice moves downhill, as it passes over masses of bedrock, it abrades rubs down like sandpaper the leading surface then plucks fragments from the trailing downhill surface. When a glacier melts, the material that is being carried on top of the glacier as moraines and within the ice, is left behind.
Unlike river erosion, the rock pieces are unsorted and angular in appearance. These are deposited as unstable piles of rock fragments which gradually settle, consolidate and become colonised by plants and animals. The other key depostional feature of glaciation is a drumlin, or rather drumlins as they are usually deposited in groups called swarms. Areas that are actively affected by snow and ice attract tourists and the winter sports industry is now well established in the more accessible mountain ranges like the Alps and the Rockies.
There are always two sides to any human economic development and these winter sports areas need to be carefully managed to strike a balance between the economic needs of the resort, safety and caring for the environment. You've had your free 15 questions for today. For unlimited access to all quizzes, games and more, you'll need to subscribe. To comply with the new e-Privacy directive, we need to ask for your consent - I agree - No thanks - Find out more.
Rapid Revision For School Students. Join Us Login. Have you ever been snowboarding? During which months is glacial ablation likely to be greater for a southern hemisphere glacier?
January to March. April to June. July to September. October to December. In the southern hemisphere, summer is at its hottest during these months so glacial ablation will be greater than glacial accumulation.
Which of the following best describes the glacial budget? The amount of money spent on research into glaciers each year. A comparison of snowfall and melting of a glacier. The money spent at a winter sports resort to ensure that people are not killed by avalanches. Something the Chancellor of the Exchequer issues on TV during the winter.
If more snow falls than ice melts, the glacier or ice field will advance. If the budget is negative, more ice melts than is formed from the winter snowfall so the glacier retreats. At the present time, climate change means the glacial budget for almost all glaciers is negative so glaciers are retreating.
In the past, the surface of the Earth has been covered by During the various ice ages, there was more ice, during warm periods like the one that occurred about 55 to 56 million years ago, even the poles were ice-free. Which of the following statements is not true? If you have a problem with anyone in Europe, now you know where to go to see who's in charge. Capitals of the World Redux.
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