Denudation


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denudation

[‚dē·nü′dā·shən]
(geology)
General wearing away of the land; laying bare of subjacent lands.

Denudation

 

the sum total of the processes of ablation and transportation (by water, wind, ice, or the direct action of the force of gravity) of disintegrated rock into subsided areas of the earth’s surface, where these products accumulate.

Tectonic movements have a great effect upon the rate and character of denudation. The direction of topographic development depends on the relationship between denudation and the movements of the earth’s crust. When the processes of disintegration and denudation predominate over the effect of a structural high, there is a gradual lowering of the absolute and relative elevations and a general leveling of the relief. As a result of the protracted predominance of denudation processes, entire highlands can be turned into rolling denuded plains (peneplains). Other denuded surfaces, such as pediments, pediplains, and piedmont steps are also the consequence of denudation. To a certain extent the intensity of denudation can be judged from the amount of drift carried away by rivers (up to several thousand tons a year). The term “denudation” is also sometimes used in a narrower sense to signify the processes of ablation (removal) of the products of erosion solely by planar washout.

References in periodicals archive ?
Loss of glands and mucosal denudation (gastrointestinal biopsies from high-risk transplant-associated thrombotic microangiopathy patients).
The Cretaceous deposits occur as a denudation remnants in linear area of the same direction towards NNW up to Kunstat in the southern foreland of continuous Cretaceous occurrence (both in the Boskovice Furrow and the margin of the Bohemian-Moravian Highland) forming there conversely several buttes evidencing significant relief inversion (Ivan, 1996).
With the most intense tectonism towards the end of the tectonic cycle, the northern margin of the Jiangnan-Xuefeng belt was the first to experience uplifting and denudation, folding, fracture and magmatism [3].
Effects of traditional Chinese formulations on rat carotid artery injured by balloon endothelial denudation.
These agents cause inflammation of endometrium, denudation of mucosa and change its secretion and thus alter uterine environment resulting early embryonic death (Elliott et al.
Severe chronic deficiencies lead to progressive papillary atrophy and irregular denudation of the tongue.
Considering that eosinophils play a particularly important role in allergic response through the release of mediators as eosinophilic cationic protein, major basic protein, and leukotriene C4, which cause extracellular matrix deposition, epithelial denudation, and basement membrane.
The first basic surgical principle for VVF repair was described in 1663 by Hedrick, who stressed the use of speculum and lithotomy position to gain adequate exposure and denudation of margins of fistula with reaproximation of 7 edges ; however the first reported surgical cure of 8 VVF documented back to 1852 by Maram Sims.
Melting of the polar ice caps, the global oceans dynamics, various weather systems, water transport, soil erosion and denudation, magma transport and manufacturing of nano-materials, improving casting processes, energetic studies, exploitation of natural resources, welding, casting and advanced solidifications are typical contemporary examples where multiphase systems play an important role.
This means that "naked corporeality" preexists the clothing of glory, and is merely made visible by the denudation of sin.
The Lawrencepur sand was derived from denudation of Higher and Lesser Himalayas and Kohistan Island Arc [25] and transported to the Indus River through a number of tributaries [27].