Slope Evolution

STEP-VI: Massive back cutting occurred along the slip face and eroded material deposited at the foothill

STEP-VII: Washing of deposited material at the foothill. Pediplain, surface of low relief broken by occasional residual hills (Inselberg) formed.

Pediplain Inselberg

Pediment

Pediplain thought to be produced by coalescence of several pediments

Pediment

Slope replacement theory of Penck deals with the cutting back of steeper slope and down cutting of gentler slope. The steeper slope gets replaced by the gentler slope from below. The theory was originated with the cycle of erosion of Penck. Slope replacement theory explains the evolution of the slope and subsequent transformation transformation from steeper slope to gentle one.

STEP-I: Simultaneous action of Endogenetic and Exogenetic forces on Earth’s Surface

STEP-II: Stage of gradual uplift

STEP-III: Massive back cutting on the steeper slope occurs along the slip face

A

STEP-I: Eroded material deposited at the foothill and leads to replacement of earlier steeper slope (at A) by the gentler slope thus formed by the deposited material at the foothill

STEP-I: Further erosion by back-cutting parallel to the original slope.

B

Point of rotation

STEP-I: Fresh deposition of eroded material at the foothill leads to further replacement of steeper slope (at B) by gentle one from below

STEP-I: Further influence of exogenetic forces leads to the formation of  “endrumpf” like pediplain with pediplain with residual hills called Inselberg

Endrumf Inselberg

Slope replacement is a combine effect of parallel retreat on the uphill slope and slope decline on the down hill side