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Erosional surfaces within the stratigraphic record are known as unconformities, but not all unconformities are buried erosion surfaces. Erosion surfaces vary in scale and can be formed on a mountain range or a rock. [2] Particularly large and flat erosion surfaces receive the names of peneplain, paleoplain, planation surface or pediplain. An ...
The African Surface or African Erosion Surface is a land surface formed by erosion covering large swathes of Africa. [1] The type area of the surface lies in South Africa where the surface was first identified as such by Lester Charles King in the mid-20th century. [2] The term was coined by King for certain high surfaces in southern Africa ...
Erosion and changes in the form of river banks may be measured by inserting metal rods into the bank and marking the position of the bank surface along the rods at different times. [23] Thermal erosion is the result of melting and weakening permafrost due to moving water. [24] It can occur both along rivers and at the coast.
Although the terms erosion and denudation are used interchangeably, erosion is the transport of soil and rocks from one location to another, [1] and denudation is the sum of processes, including erosion, that result in the lowering of Earth's surface. [2]
Bank erosion is the wearing away of the banks of a stream or river. This is distinguished from changes on the bed of the watercourse, which is referred to as scour. Erosion and changes in the form of river banks may be measured by inserting metal rods into the bank and marking the position of the bank surface along the rods at different times. [17]
In geology and geomorphology a planation surface is a large-scale land surface that is almost flat with the possible exception of some residual hills. The processes that form planation surfaces are labelled collectively planation and are exogenic (chiefly erosion). Planation surfaces are planated regardless of bedrock structures. [1]
Download QR code; Print/export Download as PDF; Printable version; In other projects Wikimedia Commons; Wikidata item; ... Erosion surface; Exhumed river channel; F.
The result is that the surface is eroded chiefly backward and that downward erosion is limited. [1] [3] In contrast to common peneplain conceptualizations several pediplains might form simultaneously at different altitudes and do not necessarily grade to a base level. [2] Pediplains are normally formed in areas of arid and semi-arid climate. [5]