What is antecedent drainage system?
What is antecedent drainage system?
From Wikipedia, the free encyclopedia. An antecedent stream is a stream that maintains its original course and pattern despite the changes in underlying rock topography. A stream with a dendritic drainage pattern, for example, can be subject to slow tectonic uplift.
Who is known as antecedent river?
The Indus, Satluj, Ganga, Sarju (Kali), Arun (a tributary of Kosi), Tista and Brahmaputra are some of the important antecedent rivers, originating from beyond the Greater Himalayas. 2. Consequent Rivers. The Rivers which follow the general direction of slope are known as the consequent rivers.
What is an antecedent stream and how might one form?
What is an antecedent stream and how does one form? An antecedent stream predates the existence of the hill or mountain through which it flows. One forms through a stream being made before the uplift begins. The stream maintains its course and erodes through slowly rising anticlinal ridge.
What is antecedent Valley?
a river valley that cuts across an increasing elevation and in terms of geological age is older than that elevation. Antecedent valleys arise when a portion of the earth’s surface on which a river network has formed is uplifted and the rate of the river’s erosion exceeds the rate of the uplifting.
What is the meaning of drainage pattern?
A drainage pattern is the pattern formed by a stream network and refers to the connectivity of the stream tributaries in an area, regardless of whether the stream tributaries are occupied by perennial streams.
Is Ganga older than Himalaya?
father! For, the Puranas describe Ganga as the darling daughter of Himavant, the ‘Nagadhiraja’ or the king of mountains! (Figure 1). It so happens that the majority of Ganga’s sisters – the rivers of the northern mountain realm – are older than the Himalaya in whose lap they were born.
What is the most common drainage pattern?
dendritic drainage pattern
A dendritic drainage pattern is the most common form and looks like the branching pattern of tree roots. It develops in regions underlain by homogeneous material. That is, the subsurface geology has a similar resistance to weathering so there is no apparent control over the direction the tributaries take.
Is Ganga older than Himalayas?
Which is the best explanation for antecedent drainage?
antecedent drainage The hypothesis that a stream crossing a geologic structure may be older than that structure. Such a stream is believed to maintain its course across a developing fold or fault. This is a favoured explanation for streams crossing structures in geologically active areas, as do the Arun in the Himalayas,…
What is the difference between an antecedent river and a superinduced River?
They are antecedent because they continued flowing in their course despite the upliftemet of area as Himalayas. Also called as discordant/epigenetic/superinduced river. Also known as inconsequent drainage. In antecedent drainage, a part of a river slope and the surrounding area uplifts but the river maintains its original slope.
How did the drainage pattern change over time?
Subsequently the pattern was lowered by river incision so it now lies across geologic structures to which it bears no relation. Pick a style below, and copy the text for your bibliography.
How is Superimposed drainage related to epigenetic drainage?
superimposed drainage (epigenetic drainage) A drainage pattern that has been established on an earlier surface (perhaps conformable with the immediately underlying strata, and standing well above the present landscape). Subsequently the pattern was lowered by river incision so it now lies across geologic structures to which it bears no relation.