Ultimately,the base level of a stream valley can be no lower than the ________.
A)average elevation of the continent on which it is found
B)average elevation of the sea
C)average elevation of the local catchment
D)maximum elevation of the local catchment

Question

Quizplus · Accepted Answer

The base level of a stream valley is the lowest point to which a stream can erode its channel. If the stream erodes its channel below the level of the body of water into which it empties (its base level), it will no longer have the energy to continue to erode downwards. The base level is typically the average elevation of the sea since most streams ultimately flow into the ocean. Therefore, the base level cannot be lower than the average elevation of the sea.

Ultimately,the Base Level of a Stream Valley Can Be No