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(Article of periodic en Anglais - 1978)

Document title

First stages of relief transformation of the young uplifted mountains

Authors(s) and Affiliation(s)

STARKEL L. ;

Abstract

The outlined picture of the complexity of influence of positive tectonic movements on the origin and initial stages of relief transformations of mountains, inclines to underline the statement by M. Morisawa (1975) about the composite character, both in time and space, of interactions in a system and a great variety of landforms. Although the size of movements decides about the scale of equilibrium disturbance (rise of gradients frequently with a coincident rise of precipitation and an increase in the resistance of bedrock as downcutting continues), the type of movement as well as the location of an uplift block, the resistance of bedrock and the variability of climatic regime cannot also be neglected. The pattern of movements (faulting, folding) controls the position of base-levels of erosion which, especially in the case of difference in the size of uplifting block, can involve various effects in its later evolution. The regularity of mountain degradation to lag behind upward movements, so distinctive of jump-type movements, is easily readable on comparing the dissection and lowering of mountains composed of different lithological complexes. Bedrock resistance is of essential importance since it controls the size of slope evolution retardation relative to the progress of vertical erosion, and the possibility of survival of old relief in watershed zones. The structure of bedrock is of importance starting with the first stage of the fragmentation of an uplifted massif, and it is then that the outline of structure-controlled relief comes into being. (d'après l'A.).

Source

Article of periodic

published at : Studia geomorphologica carpato-balcanica Krakow

Editor :

Millesime : 1978, vol. 12 [pp. 45-61]

Bibliographic references : 38réf.

Language

Anglais

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