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25 Cards in this Set

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Rock particles that are picked up and transported during erosion will ultimately be deposited somewhere else.
Deposition
When a river meets the sea its velocity suddenly reduces. This reduction in velocity means that much of the rivers load is deposited at the mouth of the river. If the river deposits quicker than the sea can erode then a delta starts to develop.
Delta
A bend in the river.
Meander
The areas of land that rivers flood onto when they exceed bank full discharge. They are created by the constant movement of meanders.
Floodplains
Water and air getting into cracks in a rivers banks and bed causing erosion, through increased pressure.
Hydraulic Action
The process of a rivers' load crashing and rubbing into a rivers' banks and bed causing pieces to break off.
Corrasion (Abrasion)
The process of water dissolving a rivers' load as well as its bed and banks.
Corrosion (Solution)
Load crashing into each other in a river. This normally happens with suspended load.
Attrition
The process of large pieces of load rolling along a river bed.
Traction
The process of load bouncing a long a river bed.
Saltation
The process of smaller pieces of load being carried in a rivers flow.
Suspension
The process of dissolved pieces of material being transported in a solution.
Solution
When material is transported on the surface of the river.
Flotation
Upper Course
Waterfalls
Rapids
Gorges
V-shaped Valleys
Interlocking Spurs
Middle Course
Meander
Oxbow Lakes
Levees
Braided Rivers
Lower Course
Deltas
Oxbow Lakes
Meanders
Floodplains
A deep sided valley left behind when a waterfall retreats.
Gorge
The areas of the valley (hills) that stick out into the river forcing it to meander around them.
Interlocking Spurs
Are created when two meanders connect.
Oxbow lakes
Braided rivers usually occur on rivers with variable flow. When the river flow is high the river has excess energy and can transport large amounts of load. However, when the flow is low, the river is forced to deposit its load. The deposited material forces the reducing flow into small channels creating a braided river.
Braided Rivers
When a river floods the velocity of the river travelling over the flooded floodplain suddenly falls. Because of the fall in velocity (and subsequent reduction in surplus energy) the river immediately deposits its largest load creating embankments that line the river channel. Over time (and after many flood events) these embankments begin to grow in size and become more stable.
Levees
Holes found in the river bed. Load carried by the river is washed around in a circular motion causing vertical erosion.
Potholes
The long profile is the course the river takes from its source to its mouth. The long profile is often split into upper course and lower course (and sometimes middle course as well)
Long Profile
A surface or shape that is or would be exposed by making a straight cut through a river.
Cross Section
How are V-shaped valleys formed?
The river will erode (cut) downwards while the sides are weathered (attacked by the weather e.g. rain, wind and the sun). The weathered material will then fall into the river and be transported away leaving a v-shaped valley.