Meltwater (erosion & deposition)
- Created by: Ali Bland
- Created on: 17-03-15 21:16
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- Meltwater Streams
- When glacial ice melts, water runs out as streams of meltwater
- Warm-based glaciers produce lots of meltwater
- Surface meltwater filters through the glacier and flows through tunnels underneath the glacier before running out of the snout
- Meltwater Streams - Erosion
- Meltwater streams cause erosion in the same way as normal rivers but cause more erosion than rivers the same size
- They flow quickly so can carry lots of material which can erode landscape
- The streams form deep troughs in the landscape called meltwater channels
- Meltwater Deposition
- When the meltwater discharge decreases,the loss of energy causes debris to be deposited
- Heavier particles are dropped first resulting in sorting of the material
- Deposits may be found in layers (stratified) as a result of seasonal variations in meltwater flow
- The main features produced by deposition are eskers, lames and the outwash plain
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