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River Erosion
The wearing away of the river's banks and beds.
V-shaped valley
Valleys vertically eroded due to fast flowing water often found in upland areas.
Interlocking spurs
A series of ridges projecting out on alternate sides of a valley and around which a river winds its course.
Waterfall
A cascade of water falling from a height, formed when a river or stream flows over a precipice or steep incline.
Differential erosion
When softer rocks are eroded at a higher rate than harder rocks.
Plunge Pool
A pool at the base of a waterfall formed by erosion
Undercutting
Wearing away the lower part of the rock.
Retreat
When the waterfall gradually moves back, leaving a gorge
Gorge
The straight sided valley which is left when a waterfall retreats.
Meander
A river bend.
Lateral erosion
Sideways erosion by a river on the outside of a meander channel.
River cliff
Steep outer edge of a meander where erosion is at its maximum.
Slip-off slope
A gentle slope at the inner bend of a river, made from the deposition of material.
Point bar
Another name for a slip-off slope
Deposition
Process in which sediment is laid down in new locations.
Ox-bow lake
An arc-shaped lake which has been cut off from a meandering river.
Flood plain
The flat, wide area of land along a river.
Natural Levee
An elevated landform composed of alluvium that parallels some streams and acts to confine their waters, except during floodstage.
Estuary
The tidal mouth of a large river, where the tide meets the stream.