An interruption in a stream's graded profile of equilibrium is called a
A)gradation.
B)longitudinal interruption.
C)base level.
D)nickpoint.
E)riffle

Question

Quizplus · Accepted Answer

An interruption in a stream's graded profile of equilibrium is called a nickpoint. A nickpoint is usually created by either a change in the base level of a stream, such as a drop in sea level or the construction of a dam, or by a change in the underlying geology that leads to a sudden increase in stream gradient. This disruption in equilibrium causes the stream to adjust its channel and erode the bedrock, creating a waterfall or steep rapids.

An Interruption in a Stream's Graded Profile of Equilibrium Is