Water On The Land: River Landforms Flashcards
How are MEANDERS formed?
By erosion and deposition.
In which courses do meanders form?
middle and Lower courses.
Where is the CURRENT faster? Why?
Outside bend.
River channel is deeper.
Less friction to slow down the water.
Where does MORE erosion take place? What does it form?
Outside bend, forming river cliffs.
Why is the current SLOWER on the inside bend?
River channel is shallower.
More friction to slow down water.
Where is the eroded material DEPOSITED?
On the inside bend.
What does the eroded material FORM?
Slip-off slopes.
How are OX-BOW LAKES formed?
From meanders.
First step in forming an OX-BOW LAKE?
Erosion causes outside bends to get closer.
Second step in forming an OX-BOW LAKE?
Until there’s only a small bit of land left between the bends. (Called the neck)
Third step in forming an OX-BOW LAKE?
River breaks through the land, usually during a flood.
Fourth step in forming an OX-BOW LAKE?
River flows along the shortest course
Fifth step in forming an OX-BOW LAKE?
Deposition eventually cuts of the meander
Sixth step in forming an OX-BOW LAKE?
When the ox-bow lake is formed?
