What is a pediment in a desert?
What is a pediment in a desert?
A pediment is a gently sloping erosion surface or plain of low relief formed by running water in arid or semiarid region at the base of a receding mountain front. A pediment is underlain by bedrock that is typically covered by a thin, discontinuous veneer of soil and alluvium derived from upland areas.
How are desert pediments formed?
Pediments are erosional surfaces. A pediment develops when sheets of running water (sheet floods) wash over it in intense rainfall events. It may be thinly covered with fluvial gravel that has washed over it from the foot of mountains produced by cliff retreat erosion.
Who has named pediment?
1The landforms known as pediments were so called by Gilbert (1890, p. 183; see also McGee, 1897, p. 92) as a metaphor for features typical of classical Greek architecture.
Which of the following theory is associated with pediment formation?
Lateral Erosion Theory: G.K. Gilbert attributed the formation of pediments to lateral corrasion by streams.
What is pediment in architecture?
pediment, in architecture, triangular gable forming the end of the roof slope over a portico (the area, with a roof supported by columns, leading to the entrance of a building); or a similar form used decoratively over a doorway or window. The pediment was the crowning feature of the Greek temple front.
What is pediment and bajada?
The pediment is strictly degradational, the slope cutting across the bedding of older formations, with only a thin veneer of gravelly debris; in contrast, the bajada is a three-dimensional prism, stratified parallel to the slope, and underlain by poorly sorted gravels and detritus, torrent and mudflow deposits, Series …
How are piedmont plains formed?
piedmont, in geology, landform created at the foot of a mountain (Italian: ai piede della montagne) or mountains by debris deposited by shifting streams. Such an alluvial region in a humid climate is known as a piedmont for the Piedmont district of Italy; in arid climates such a feature is called a bajada (q.v.).
What are pediments made of?
Use of Pediments For many Greek temples, first made of wood, the triangular geometry had a structural function. Fast forward 2,000 years from ancient Greece and Rome to the Baroque period of art and architecture, when the pediment became an ornamental detail to be extravagantly modified.
What are pediments used for?
What do you mean by pediment?
Definition of pediment 1 : a triangular space that forms the gable of a low-pitched roof and that is usually filled with relief sculpture in classical architecture also : a similar form used as a decoration.
What was the purpose of sculpture in the pediment?
Originally a feature of Ancient Greek architecture, pedimental sculpture started as a means to decorate a pediment in its simplest form: a low triangle, like a gable, above an horizontal base or entablature.
What is Piedmont landform?
A piedmont is an area at the base of a mountain or mountain range. The word piedmont comes from the Italian words pied and monte, which mean “foot” and “hill.” Piedmont lakes and piedmont glaciers, for example, are simply lakes and glaciers located at the foot, or base, of mountains.
