Topic: Salient features of world’s physical geography. Important Geophysical phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc.
1) What do you understand by Intrusive volcanic landforms? Discuss briefly the different types of intrusive landforms. (250 words)
Physical Geography by G C Leong
Why this question:
The question is straight forward and is based on the static portions of GS paper I.
Key demand of the question:
One must explain the concept of Intrusive landforms with suitable diagrams and discuss them in detail.
Discuss – This is an all-encompassing directive – you have to debate on paper by going through the details of the issues concerned by examining each one of them. You have to give reasons for both for and against arguments.
Structure of the answer:
In short define what landforms are.
Explain the following in the answer body-
Volcanic eruptions result in the formation of landforms and here we are going to discuss volcanic landforms.
Intrusive Forms – The lava that is discharged during volcanic eruptions on cooling develops into igneous rocks.
The cooling may take place either on arriving on the surface or also while the lava is still in the crustal portion.
According to the location of the cooling of the lava, igneous rocks are categorized as plutonic rocks and volcanic rocks.
The lava that cools inside the crustal portions takes diverse forms. These forms are called intrusive forms.
Conclude with importance of these landforms.