The cycle of erosion as outlined by Davis is now generally accepted as the normal succession of events in an undisturbed area, and its final result, the baseleveled plain, is likewise regarded as the great datum plain in all physiographic investigation.
Since this physical feature has attained such prominence in the study of modern geography, it seems opportune to inquire, W hat is the ultimate result of undisturbed erosion ? Is it possible under such circumstances to produce a perfect plain, or will there always be irregularities of elevation and the surface remain merely a peneplain ?
So far as the writer is aware, no one has attempted a complete analysis of the processes of erosion during the final stages of the cycle. It has been frequently said that the result is a baseleveled plain, but it is doubtful if the . . .