To surround with a trench or ditch, usually purpose built to hold water
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Category: <span>M</span>
A sulphide ore of arsenic, arsenopyrite. FeAsS
A geological time, 24 million to 5 million years ago, during which modern mammals and birds appeared
The process by which a mineral is first introduced to rock
The process, in whole or partially, of exploiting minerals for human use
A homogenous substance with defined chemical and physical properties, whose constituents are listed on the periodic table of elements
Calculated reserves with an approved plan of extraction
Broken rocks or loose earth
The study of crystal formation
An underground transportation method utilizing a single overhead rail or cabling system to convey ore in a series of carts or buckets