Question

Is complete reduction of relief of a high land mass possible?

Answer 1

No, complete reduction of relief of a high land mass is rarely achieved because endogenous (tectonic) forces continuously uplift the land while exogenous forces wear it down.

• Theoretically, yes, continuous erosion can reduce a high landmass into a featureless plain called a peneplain.
• Practically, no, because tectonic uplift frequently rejuvenates the landmass, preventing it from ever being completely worn down.