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
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Mineral mining
Physical geology
Mining; General mining
A broad division of geology that concerns itself with the processes and forces involved in the inorganic evolution of the Earth and its morphology, and with its constituent minerals, rocks, magmas, ...
Cassel brown
Mining; General mining
A brown earthy substance found in peat and lignite beds and used as a pigment; originally found near Cassel, Germany. Cologne brown or Cologne earth is a similar substance originally found near ...
Brownstone
Mining; General mining
A brown or reddish-brown sandstone with grains generally coated with iron oxide; specif. a dark, reddish-brown, ferruginous quartz sandstone of Triassic age.
Pyroretin
Mining; General mining
A brittle, brownish-black resin that occurs in brown coal near Aussig, Bohemia; sp gr, 1.05 to 1.18.
Esplanade
Mining; General mining
A broad bench or terrace bordering a canyon, esp. in the plateau areas of the southwestern United States.
Pyrogenesis
Mining; General mining
A broad term encompassing the intrusion and extrusion of magma and its derivative. Adj. pyrogenic.
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