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InterviewSolution
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Short note on erosional mountain |
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Answer» tonic forces that LEAD to mountain building are continuously countered by erosion due to intensified precipitation, wind and temperature extremes. These elements, aided by the force of gravity, are particularly powerful along the mountain ranges which form a barrier to the prevailing westerly winds that buffet New Zealand.Falling ice, rocks and gushing water wear AWAY at the mountain slopes. The ice and ROCK debris accumulates in the valleys and flows downwards as slow moving glaciers. When these melt, piles of rock debris called moraines are LEFT behind.Strong winds pick up dust and abrade exposed rock surfaces.Lightning instantly vaporizes water and ice in rock fissures and literally BLOWS rocks apartRock falls and ice avalanches scour mountain sides, further eroding the slopes.The powerful earthquakes that are responsible for the uplift of New Zealand’s mountains also destabilise them, causing many rock falls and avalanches that help to wear them down |
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