Sentence Examples


  • By a re-elevation of a peneplain the rivers of an old land surface may be restored to youthful activity, and resume their shaping action, deepening the old valleys and initiating new ones, starting afresh the whole course of the geographical cycle.
  • This upland is an uplifted peneplain of subaerial denudation,' now so far advanced in a " second " cycle of weathering and so thoroughly dissected that to an untrained eye it appears to be only a country of hills confusedly arranged.
  • In the nature and position of the upland rocks - mainly crystalline schists and gneisses, excessively complicated and disordered in mass, and also internally deformed - there is found abundant proof that the peneplain is a degraded mountain region.
  • ' In some localities it is not easy to establish irrefutably and in detail the inter-arrangement of drainage and rock structure that proves it to be a subaerial peneplain instead of an uplifted submarine platform; but the general proof is very clear.
  • To the east and north-east of the Bitterroot Mountains is a considerable basin or peneplain dissected by short ranges having a northwest and south-west trend.

How would you define peneplain? Add your definition here.

comments powered by Disqus