Geomorphology [Optionals IAS Mains Geography]: Questions 1 - 10 of 65

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Question 1

Geomorphology
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Appeared in Year: 2016

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Essay▾

Discuss the ‘Basket of egg՚s topography’ .

Explanation

‘Basket of Egg՚S Topography’

  • Basket of egg ′ s topography ′ is the topography of drumlins, which are generally found in clusters.
  • Drumlins are formed by the deposition of glaciers in a till plain.
  • These are swarms of oval, elongated hummocks, which are composed of boulder clay.
  • Its shape is like an inverted boat or inverted half egg. It has unsymmetr…

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Question 2

Geomorphology
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Appeared in Year: 2012

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Explain how Bosche and Haldenhang lead to the Theory of Slope Replacement.

Explanation

Theory of Slope Replacement

  • Theory of Slope replacement was propounded by Penck. He explained that Slope replacement means original steep slopes being replaced by lower angle slopes which extends upwards from the base at a constant angle.
  • The final stage is the declining intensity of erosion as given by Penck. In this stage, upliftment of landform ha…

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Question 3

Geomorphology
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Appeared in Year: 2012

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Characteristics of the standard epigene cycle of erosion.

Explanation

Characteristics of the Standard Epigene Cycle of Erosion

Kings idea can be understood in terms of 3 components:

  1. Slope element
  2. Development of Hill slope
  3. Epigene cycle of erosion

Epigene: Understanding the Basics

  • The term epigene refers to the surface. Hence we say epigene cycle of erosion is related to water and wind.
  • In addition to weathering, mass wastin…

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Question 4

Geomorphology
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Examine the concept of Isostasy laid down by Airy & Pratt.

Explanation

Concept of Isostasy

The concept of Isostasy refers to equilibrium maintained between tall raised & deep seated lithospheric features especially when lithosphere is floating over asthenosphere & earth is rotating around its axis. Two scholars laid down two different concepts to explain Isostasy:

  1. Pratt՚s – Level of compensation

    According to Pratt, litho…

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Question 5

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Appeared in Year: 2016

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“Geological structures has a dominant control on landforms and is reflected on them.” Discuss.

Explanation

Geological Structures and Landforms

  • Geological structures includes all those ways in which the earth materials that help in the formation of landforms, those landforms are different from one another in their physical and chemical properties.
  • The term structure in its broad sense includes lithology or nature of rocks, arrangement, and deposition of ro…

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Question 6

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Appeared in Year: 2016

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“In explaining the concept of pediplanation, King combined the ideas of Davis, Penck and Wood with his own” . Elaborate.

Explanation

Concept of Pediplanation

  • According to King, all the four elements i.e.. , summital convexity, free face, rectilinear, basal concavity are found in standard slope.
  • The complete formation of any slope depends on local conditions. Strong bed and relief come under local conditions.
  • If any of the two is absent then free face and debris slope would not form…

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Question 7

Geomorphology
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Short Answer▾

Explain the formation sequence of arch, stack and stump. (5 Marks)

Question 8

Geomorphology
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Explain the main reasons for formation of erosional landforms in glacial regions. Differentiate these with Aeolian landforms. (10 marks)

Explanation

Formation of Erosional Landforms in Glacial Region

  • Weight of the glacial body.
  • Carrying of debris because of cohesive force of ice.
  • The debris causes abrasion leading to erosion.
  • This leads to the formation of various landforms like cirque, hanging valley and aretes.

Aeolian Erosion Occurs Due To

  • Speed of wind and its carrying capacity.
  • Some material are …

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Question 9

Geomorphology
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Short Answer▾

Why are blowholes unique to coastal regions? (5 Marks)

Question 10

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Differentiate between attrition, corrosion, and corrasion (5 Marks)