The landform of 'Hanging Valley' is associated with which of the following geomorphic process?
- (a)Wind
- (b)Glacier
- (c)Sea Waves
- (d)Running Water
Correct — B, Glacier.
A hanging valley forms where a small tributary glacier once joined a large trunk glacier. The trunk glacier, carrying far more ice, gouged its valley much deeper than the tributary could gouge its own. When the ice melted, the tributary valley was left perched high above the main trough. The process is Glacier.
The stream that now drains the tributary valley pours over its lip as a waterfall; Bridalveil Fall in Yosemite and Staubbach Falls above Lauterbrunnen are classic examples. The idea to carry: a hanging valley records unequal glacial deepening of two joined valleys — the stream inherits the drop rather than cutting it.
- (a)Wind — Wind works by deflation and abrasion on dry, loose surfaces and shapes small-scale rock and dune forms rather than deep valleys. Wind is the right answer for mushroom rocks, yardangs, zeugen and barchans, the aeolian landforms of arid regions.
- (c)Sea Waves — Wave action is confined to the coastline, cutting and depositing along the shore. Sea waves are the right answer for cliffs, sea caves, stacks and spits, landforms that sit where land meets sea rather than high in a mountain valley.
- (d)Running Water — The waterfall at the mouth of a hanging valley makes this option look plausible. In the standard landform classification, though, the hanging valley is a glacial erosional feature: ice deepened the trunk valley, and the stream merely uses the step it was left with.
Running water is the right answer for V-shaped valleys, gorges, meanders and deltas, the fluvial landforms.
Each geomorphic agent — running water, glacier ice, wind, sea waves, groundwater — works in its own way and leaves a recognisable family of erosional and depositional landforms. Classifying a landform means asking whose manner of working explains its shape.
Glaciers erode by plucking and abrasion across the whole thickness of the ice, so they widen and deepen valleys into U-shaped troughs. Where a small ice stream joined a large one, unequal deepening leaves the smaller valley perched: a hanging valley.
Uttarakhand is glacier country. Gangotri, Pindari and Milam are among the glaciers occupying its high valleys, so glacial erosional forms belong to the state's own physical geography rather than to a distant textbook case.
The hanging valley is taught alongside the cirque, arête, horn, U-shaped valley and fjord in NCERT Class 11 physical geography. Knowing the family lets you place any one member the moment it is named.
- A hanging valley is a tributary glacial valley whose floor lies well above the floor of the main trough, ending in a steep step.
- It forms because the large trunk glacier deepens its valley far more than the small tributary glacier deepens its own.
- Streams leaving a hanging valley typically plunge as waterfalls; Bridalveil Fall in Yosemite is a textbook example.
- Glacial erosional landforms include the cirque, arête, horn, U-shaped valley (glacial trough), hanging valley and fjord.
- Glacial depositional landforms include moraines, drumlins, eskers, kames and outwash plains.
- Aeolian (wind) landforms include mushroom rocks, yardangs, zeugen, deflation hollows, barchans, seif dunes and loess.
- Marine (sea-wave) landforms include cliffs, wave-cut platforms, sea caves, arches, stacks, beaches, spits, bars and tombolos.
- Fluvial (running-water) landforms include V-shaped valleys, gorges, potholes, meanders, oxbow lakes, floodplains, natural levees and deltas.
- NCERT Class 11 physical geography treats hanging valleys under glacial troughs, describing them as perched at an elevation on the sides of the main valley.
- A tarn is a lake in a cirque; paternoster lakes are a chain of lakes strung along a glacial trough.
Match the landform to the agent whose way of working explains its shape; the hanging valley sits in the glacial row.
- The waterfall at the lip of a hanging valley pulls the reasoning toward 'Running Water'; the drop was made by ice deepening the trunk valley, and the stream inherits it.
- The word 'valley' pulls toward rivers by reflex; check the valley's shape first — a U-shaped trough with a perched tributary is the glacial signature, a V-shaped one the fluvial.
- Cirque, tarn and hanging valley are glacial erosional forms; moraine, drumlin and esker are glacial depositional — a question that says 'erosional' separates the two sub-sets.
- A fjord is a glacial trough drowned by the sea; its sea-water filling can pull the answer toward 'Sea Waves' although the trough was cut by ice.
The idea arrives as a landform named in the stem with the agent to be picked, as here; reversed, with the agent named and the odd landform to be found; or as match-the-pairs lists of landforms against agents.
A second form tests the sub-set: erosional versus depositional glacial forms, or a description of the shape — a perched tributary valley with a waterfall — with the name to be supplied.
CDS_GK_2022_II_Q892022Same question shape: a named landform, and the geomorphic process to be chosen from glacial, periglacial, aeolian and fluvial. Differs in the landform — pingos are ice-cored mounds of permafrost ground (periglacial), while the hanging valley is cut by moving glacier ice; the two sit in neighbouring but distinct process categories.
CAPF_GAI_2022_Q1192022Asks the same landform-to-process logic from the process side: solifluction is a slow soil flow over permafrost. Shares the cold-climate theme; differs in testing periglacial mass movement rather than a glacial erosional landform.
HPSC_2021_MAINS_GSI_Q972021The contrast case: it tests the fluvial family (meanders and the stage of the river cycle in the Kashmir valley), the agent that is distractor (d) here. Same classification skill, different agent, and asked as multi-statement rather than single-choice.
- practice — not a real PYQ
Which one of the following is an erosional landform produced by a glacier?
- (a)Yardang
- (b)Cirque
- (c)Oxbow lake
- (d)Tombolo
Answerb — A cirque is the armchair-shaped hollow cut at a glacier's head by plucking and abrasion. A yardang is a wind-carved ridge (aeolian); an oxbow lake is a cut-off meander loop (fluvial); a tombolo is a sand bar joining an island to the shore (marine deposition). - practice — not a real PYQ
A tributary valley opens high on the wall of a broad U-shaped trough, and its stream drops as a waterfall into the main valley. This landform is called a:
- (a)Gorge
- (b)Hanging valley
- (c)Cirque
- (d)Fjord
Answerb — A perched tributary above a U-shaped trunk valley, with a waterfall at its lip, is the hanging valley left by unequal glacial deepening.A gorge is a deep, narrow river-cut valley; a cirque is the bowl at a glacier's head, not a tributary valley; a fjord is a glacial trough drowned by the sea at a coast.
- practice — not a real PYQ
Consider the following pairs: 1. Zeugen – Wind 2. Stack – Running water 3. Drumlin – Glacier 4. Natural levee – Running water Which of the pairs given above are correctly matched?
- (a)1, 2 and 3
- (b)1, 3 and 4
- (c)2 and 4
- (d)1, 2, 3 and 4
Answerb — Zeugen are wind-abraded tabular rock masses; drumlins are elongated mounds of glacial till; natural levees are ridges of river-deposited sediment along a channel.Pair 2 fails: a stack is an isolated pillar left when a sea arch collapses, a product of wave erosion, so options a, c and d each include a wrong pair.