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Pediment – Very gently sloping inclined bedrock surface; Pediplain – Extensive plain formed by the coalescence of pediments; Peneplain – Low-relief plain formed by protracted erosion; Planation surface – Large-scale land surface that is almost flat; Potrero – Long mesa that at one end slopes upward to higher terrain
In a slippery slope argument, a course of action is rejected because the slippery slope advocate believes it will lead to a chain reaction resulting in an undesirable end or ends. [1] The core of the slippery slope argument is that a specific decision under debate is likely to result in unintended consequences. The strength of such an argument ...
(See G in Photo Gallery) They are typically several meters deep and hundreds of meters long. They begin at a single point (sometimes a small, barely resolved impact crater) high on a slope. The edges radiate downslope in a triangular fashion. In about half of the documented examples, a low-lying mound of debris is visible at the downslope end.
A slope which falls down to a deep valley on its western side and a shallower one on its eastern side has a westerly aspect or is a west-facing slope. The direction a slope faces can affect the physical and biotic features of the slope, known as a slope effect.
The notions of time, uplift, slope and drainage density evolution in the erosion cycle have been criticized. [21] Further the validity of some whole concepts associated with the cycle of erosion have been questioned including stream grade, [21] slope decline, [D] base level [21] and most of all that of peneplains. [21] [E]
This type of slip-off slope is located opposite the cutbank. [44] This term can also be applied to the inside, sloping bank of a meandering tidal channel. [45] In case of an entrenched river, a slip-off slope is a gently sloping bedrock surface that rises from the inside, concave bank of an asymmetrically entrenched river.
The term scree is applied both to an unstable steep mountain slope composed of rock fragments and other debris, and to the mixture of rock fragments and debris itself. [1] [2] [3] It is loosely synonymous with talus, material that accumulates at the base of a projecting mass of rock, [2] [4] or talus slope, a landform composed of talus. [5]
For example, input parameters are not usually measured and availability of these data is generally poor. User also should be aware of boundary effects, meshing errors, hardware memory and time restrictions. Numerical methods used for slope stability analysis can be divided into three main groups: continuum, discontinuum and hybrid modelling. [39]