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Reference Terms
from Wikipedia, the free encyclopedia

Mining

Mining is the extraction of valuable minerals or other geological materials from the earth, usually (but not always) from an ore body, vein, or (coal) seam.

Note:   The above text is excerpted from the Wikipedia article "Mining", which has been released under the GNU Free Documentation License.
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Earth & Climate News
September 27, 2016

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updated 12:56 pm ET