Niagara Falls is an example for temporary base level.

Name: Niagara Falls is an example for temporary base level.
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Niagara Falls is an example of temporary base level because erosion by the waterfall causes the rock underneath to erode and eventually lower the base level, creating a new temporary base level. However, over geologic time, the falls will continue to erode the rock and create a new base level, making it temporary.

Niagara Falls Is an Example for Temporary Base Level