Unit 1B - River Landforms
- Created by: Ajensen776
- Created on: 12-04-14 11:59
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- River Landforms
- Meanders
- The current is faster on the outside of the bend because the river channel is deeper
- So more erosion takes place on the outside bend forming river cliffs
- The current is slower on the inside of the bend because the river channel is shallower
- So eroded material is deposited on the inside of a bend, forming slip off slopes
- The current is slower on the inside of the bend because the river channel is shallower
- So more erosion takes place on the outside bend forming river cliffs
- The current is faster on the outside of the bend because the river channel is deeper
- Ox Bow Lakes
- Erosion causes the outside bends to get smaller
- Until there is only a small bit of land left
- The river breaks through this land, usually during a flood
- The river flows through the shortest course
- Deposition eventually cuts off the meander
- forming an ox bow lake
- Deposition eventually cuts off the meander
- The river flows through the shortest course
- The river breaks through this land, usually during a flood
- Until there is only a small bit of land left
- Erosion causes the outside bends to get smaller
- Waterfalls
- Waterfalls from when a river flows over an area of hard rock followed by an area of soft rock
- The softer rock is eroded more than the hard rock creating a step
- As water goes over the step it erodes more and more of the softer rock
- A steep drop is eventually created
- The hard rock is eventually undercut by erosion. It becomes unsupported and collapses
- The collapsed rocks are swirled around at the foot of a waterfall where they erode the softer rock by abrasion. This creates a plunge pool
- Overtime, more undercutting happens causing more collapsing and this causes the waterfall to retreat leaving behind a steep sided gorge
- The collapsed rocks are swirled around at the foot of a waterfall where they erode the softer rock by abrasion. This creates a plunge pool
- The hard rock is eventually undercut by erosion. It becomes unsupported and collapses
- A steep drop is eventually created
- As water goes over the step it erodes more and more of the softer rock
- The softer rock is eroded more than the hard rock creating a step
- Waterfalls from when a river flows over an area of hard rock followed by an area of soft rock
- Flood plains
- Meanders
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