Multiple levels of terraces on an old flood surface indicate what?
Answer and explanation
Correct answer: Several phases of incision and stability
The governing concept is river-terrain adjustment through alternating periods of deposition, stability, and incision. A floodplain or valley floor may be abandoned when the river cuts downward, leaving a terrace. If this sequence happens repeatedly, several terrace levels form, with higher surfaces generally representing older abandoned floodplains. Hence option B is correct. Marine deposition, wind saltation, and cave deposition cannot by themselves explain a stepped set of fluvial surfaces.
Frequently asked questions
What is the correct answer to this question?
Several phases of incision and stability
Why is this the correct answer?
The governing concept is river-terrain adjustment through alternating periods of deposition, stability, and incision. A floodplain or valley floor may be abandoned when the river cuts downward, leaving a terrace. If this sequence happens repeatedly, several terrace levels form, with higher surfaces generally representing older abandoned floodplains. Hence option B is correct. Marine deposition, wind saltation, and cave deposition cannot by themselves explain a stepped set of fluvial surfaces.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Trial Balance and Rectification of Errors.
