Most stream valleys have a V shaped cross section because______ .
A) water washing down the slope makes straight channels
B) mass wasting of weathered rocks on the slope maintain an angle of repose slope
C) vegetation on the slopes forces this profile
D) none of the above

Question

Quizplus · Accepted Answer

The V-shaped cross section is maintained because of mass wasting of weathered rocks on the slope, which maintains an angle of repose slope. This means that any loose material on the slopes will come down and maintain the angle of the slope, resulting in a V-shaped valley. The other choices are not correct because water washing down the slope can result in different types of channels, and vegetation on the slopes does not necessarily force a V-shaped profile.

Most Stream Valleys Have a V Shaped Cross Section Because______