MINERAL AND ENERGY RESOURCES IN INDIA
MINERAL AND ENERGY RESOURCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Removing chunks of overburden terraces or strips are cut into the side of a hill or mountain in order to lessen the likelihood of erosion or sudden mass wasting events.
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Structure built on a river that restricts the flow of water up until that point. Used for forming reservoirs for irrigation, drinking, manufacturing, creation of electrical energy, etc.
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A reserve that is being depleted to the point where it could be more expensive to extract and refine it than it can be sold for.
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Hydrocarbons that have been formed from the organic remains of prehistoric plants and animals and can be used as a source of energy.
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Detailed explanation-1: -Contour mining is a version of strip mining that follows the contours of outcrops and hilly terrains. Usually, the mineral seam follows the contour of the outcrop, and the overburden is removed carefully along the seam in much smaller and custom shaped excavations rather than long strips.
Detailed explanation-2: -Strip mining is the practice of mining a seam of mineral, by first removing a long strip of overlying soil and rock (the overburden); this activity is also referred to as overburden removal. It is most commonly used to mine coal and lignite (brown coal).
Detailed explanation-3: -Strip mining is a type of surface mining where the overlying vegetation, rock, and soil (overburden) is removed in order to reach the underlying coal seam, which usually lies a few feet beneath the surface.
Detailed explanation-4: -open-pit mining Mining. a method of mining in which the surface excavation is open for the duration of mining activity, employed to remove ores and minerals near the surface by first removing the waste or overburden and then breaking and loading the ore.