Mining of Minerals


 
 
Concept Explanation
 

Mining of Minerals

Extraction of minerals: Minerals can be extracted by mining, drilling or quarrying. The process of taking out minerals from rocks buried under the earth’s surface is called mining. Open-cast mining: Minerals that lie at shallow depths are taken out by removing the surface layer; this is known as open- cast mining.

Deep bores, called shafts, have to be made to reach mineral deposits that lie at great depths. This is called shaft mining.

Drilling: Petroleum and natural gas occur far below the earth’s surfaces. Deep wells are bored to take them out. This is called drilling.

Minerals that lie near the surface are simply dug out, by the process known as quarrying.

Sample Questions
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Question : 1

Coal mining in India at Raniganj in West Bengal in _______________________

Right Option : C
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Question : 2

A period of the Earth's geological history in which 98% of Indian coal was formed is _______________________

Right Option : A
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Question : 3

Name the richest, deepest and oldest gold mine in India.

Right Option : C
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