Study the given figure carefully and answer the questions that follow :
Open-cast Mining | Shaft Mining |
---|---|
Used for extracting minerals that lie close to the surface. | Used for extracting minerals that lie deep below the surface. |
Involves removal of surface layers to reach the mineral deposit. | Involves digging deep vertical shafts to access underground minerals. |
Less expensive and less dangerous. | More expensive and riskier due to depth and safety concerns. |
Arrange the following states in sequence (highest to lowest) according to their reserves of iron ore and choose the correct option.
I. Jharkhand
II. Karnataka
III. Chhattisgarh
IV. Odisha