Rivers - Erosional Landforms
- Created by: TomT254
- Created on: 31-01-16 12:14
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- Rivers: Fluvial Erosion Processes
- Waterfalls
- 1. Form where a band of hard rock meets softer rock.
- 2. Softer rock is eroded more than the harder rock, causing 'step' in the river bed.
- 3. The river gains more erosive power due to the lack of friction as it drops over the step.
- 4. As the river has greater erosive power it continues to erode the soft rock and starts to undercut it.
- 4+ As the hard rock is undercut, it can collapse.
- 5. As bits of the collapsed rock are swilled around by turbulence a deep plunge pool is carved out by abrasion.
- 6. Overtime all the undercutting will cause the water fall to collapse, it then retreats back up the river and the process starts again.
- Waterfalls
- 1. Form where a band of hard rock meets softer rock.
- 2. Softer rock is eroded more than the harder rock, causing 'step' in the river bed.
- 3. The river gains more erosive power due to the lack of friction as it drops over the step.
- 4. As the river has greater erosive power it continues to erode the soft rock and starts to undercut it.
- 4+ As the hard rock is undercut, it can collapse.
- 5. As bits of the collapsed rock are swilled around by turbulence a deep plunge pool is carved out by abrasion.
- 6. Overtime all the undercutting will cause the water fall to collapse, it then retreats back up the river and the process starts again.
- 6. Overtime all the undercutting will cause the water fall to collapse, it then retreats back up the river and the process starts again.
- 4. As the river has greater erosive power it continues to erode the soft rock and starts to undercut it.
- 3. The river gains more erosive power due to the lack of friction as it drops over the step.
- 2. Softer rock is eroded more than the harder rock, causing 'step' in the river bed.
- 1. Form where a band of hard rock meets softer rock.
- Waterfalls
- 6. Overtime all the undercutting will cause the water fall to collapse, it then retreats back up the river and the process starts again.
- 4. As the river has greater erosive power it continues to erode the soft rock and starts to undercut it.
- 3. The river gains more erosive power due to the lack of friction as it drops over the step.
- 2. Softer rock is eroded more than the harder rock, causing 'step' in the river bed.
- 1. Form where a band of hard rock meets softer rock.
- Potholes
- Potholes are small circular hollows in a river bed.
- They are formed by abrasion as turbulence swirls the rivers bedload in circular motion.
- This circular abrasions causes the bedload to rub and scrape out the hole shape on the river bed.
- Rapids
- Rapids are a steep section of river with turbulent flow.
- Found where there are several sections of hard rock.
- They are like mini waterfalls
- Waterfalls
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