IFS (Forests Services) Geology (Mains): Questions 12 - 18 of 69

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Question number: 12

» Structural Geology » Folds and Faults Classification and mechanics.Structural Analysis of Folds

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Appeared in Year: 2017

Essay Question▾

Describe in Detail

Classification of folds on the basis of orientation of axial plane (Mains Paper -1)

Explanation

Classification of folds

  • Symmetrical folds

    Two limbs dip at the same angel but in opposite directions. In this case the axial plane is vertical and it passes through the crest or trough

  • Asymmetrical folds

    Here the limbs dip at unequal angles in opposite directions. In this case the axial plane is inclined and it not necessarily passes through the crest

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Question number: 13

» General Geology » Continental Drift-Evidences and Mechanics » Plate Tectonics

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Appeared in Year: 2017

Essay Question▾

Describe in Detail

To explain about the continental drift evidences and tectonic plate movements.

Explanation

  • Introduction

    • Continental drift refers to the horizontal movement of the continents on a vast scale.

    • Continental land – composed of sial

    • Ocean floor – composed of sima

  • Geological and Paleontological evidences

    • Continental Boundaries East coast of South America matching with the west coast of Africa.

    • They fit like parts of zig-saw

    • Similarities in fossil c

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Question number: 14

» Hydrogeology and Engineering Geology » Salt Water Intrusion

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Appeared in Year: 2017

Essay Question▾

Describe in Detail

Write Note on: Ghyben – Herzberg relationship

The saltwater and underground freshwater are analysed through hydrostatic equilibrium using Ghyben – Herzberg relationship

Explanation

  • Introduction

    Salt-water intrusion or encroachment is the movement of Saltwater into underground sources (aquifers) of freshwater which can occur in coast regions or inland and the surgace movement of saltwater inland from the coast.

  • Aquifers

    • Permeable rock formations that store underground and transmit sufficient quantity of it to pumping wells are ca

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Question number: 15

» Stratigraphy and Geology of India » Classification of Stratigraphic Sequences » Paleogeography and Igneous Activity in the Indian Subcontinent

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Appeared in Year: 2017

Essay Question▾

Describe in Detail

Palaeogeographic reconstruction of India during Gondwana times, using suitable diagrams.

Explanation

Introduction

With the breakup of Gondwana, India began to disintegrate into a smaller plate, becoming partially isolated during the Early Cretaceous period.

Image of Biotic Filter Bridge

Image of Biotic Filter Bridge

  • Biotic Filter Bridge

    A biotic link between India and Africa retained because, the Indian plate collided with the Kohistan – Ladakh Arc and Arabia collided with the Oma

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Question number: 16

» General Geology » The Solar System

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Appeared in Year: 2017

Essay Question▾

Describe in Detail

Protoplanetary hypothesis and its relationship to the solar nebula. To discuss a hypothesis regarding the origin of the earth.

Explanation

  • Introduction

    • There are few theories for the origin of the solar system. These are classified as Evolutionary theories and catastrophic theories

    • Evolutionary theories suggest Formation of planets during the evolution of sun. Nebular hypothesis is an example of evolutionary theory.

    • Catastrophic theories Planets are formed by some special accident

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Question number: 17

» Hydrogeology and Engineering Geology » Hydraulic Conductivity

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Appeared in Year: 2017

Essay Question▾

Describe in Detail

Elaborate the procedure for ‘Aquifer performance test’ and estimation of hydraulic properties of aquifers. (Mains Paper-1)

Explanation

  • Introduction

    • Permeable rock formations, which store under groundwater and transmit sufficient quantity of it to a pumping well, are called aquifers.

    • The performance characteristics of well and hydraulic head of an aquifer can be determined by the pumping test. Pumping test is used to determine the aquifer hydraulic characteristics. This data give a m

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Question number: 18

» Geomorphology and Remote Sensing » Basic Concepts of Geomorphology

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Appeared in Year: 2017

Essay Question▾

Describe in Detail

To discuss Geomorphic features in East coast –Coromandel Coast

Explanation

Introduction

  • In Eastern coast of India – crystalline rocks of late quaternary deposits are available,

  • They are grouped as

    • Marine calcareous

    • Coralline or crystalline

  • The reef at Periyathalai is a geological formation of calcareous rock ◊ It is also prevalent between Kanyakumari and Rameswaram.

Image of Vegetated wet lands

Image of Vegetated Wet Lands

  • Vegetated wet lands

    • Mangrove – Taxo

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