10 Terms
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Mineral mining
The extraction of valuable minerals or other geological materials from the earth for economic interests.
Industry: Mining
Add a new termContributors in Mineral mining
Mineral mining
Diatreme
Mining; General mining
A breccia-filled volcanic pipe that was formed by a gaseous explosion.
Overcrossing
Mining; General mining
A bridge where a return airway passes over (overcast) or under (undercast) an intake airway. It is generally constructed with concrete blocks, structural steel, and/or sheet metal, and is made ...
Bridge
Mining; General mining
A bridge where a return airway passes over (overcast) or under (undercast) an intake airway. It is generally constructed with concrete blocks, structural steel, and/or sheet metal, and is made ...
Overgate
Mining; General mining
A bridge where a return airway passes over (overcast) or under (undercast) an intake airway. It is generally constructed with concrete blocks, structural steel, and/or sheet metal, and is made ...
Legend
Mining; General mining
A brief explanatory list of the symbols, cartographic units, patterns (shading and colour hues), and other cartographic conventions appearing on a map, chart, or diagram. On a geologic map, it shows ...
Key
Mining; General mining
A brief explanatory list of the symbols, cartographic units, patterns (shading and colour hues), and other cartographic conventions appearing on a map, chart, or diagram. On a geologic map, it shows ...
Anthraxylous coal
Mining; General mining
A bright coal (composed of anthraxylon and attritus in which the translucent cell-wall degradation matter or translucent humic matter predominates) in which the ratio of anthraxylon to attritus is ...
