Short Notes - Rocks and Minerals
Category : UPSC
Rocks and Minerals
Types of Rocks
Basic rocks Metamorphosed
Whole Earth's Composition
Elements |
Percentage |
Iron |
35 |
Oxygen |
30 |
Silicon |
15 |
Magnesium |
13 |
Nickel |
2.4 |
Sulphur |
1.9 |
Calcium |
1.1 |
Aluminium |
1.1 |
Others |
1.0 |
Earth's Crust
Elements |
Percentage |
Oxygen |
46 |
Silicon |
28 |
Aluminium |
8 |
Iron |
6 |
Magnesium |
2 |
Calcium |
4 |
Potassium |
2.3 |
Sodium |
3.0 |
Others |
1.0 |
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