are a series
of very short and fast falls.
the rapids, the river is shallow
and flowing very quickly
over rocks, boulders and stones sticking out above the water level.
When a river flows
through an area of alternating bands of resistant
and less resistant rocks, the less resistant rocks are
eroded more quickly.
Therefore, the less
resistant rocks are at a lower level compared
to the more resistant rocks. This results in the river falling in a series
of steps along the bands of resistant rocks to form rapids.
A series of
rapids is known as a cataract.
Famous Rapids in the
McBee Creek, Oregon Bond Falls, Western Michigan