Mineral mining

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

pneumatolytic

Mining; General mining

A term used in different connotations by various authors and perhaps best abandoned. It has been used to describe: (1) the surface effects of gases near volcanoes; (2) contactmetamorphic effects ...

pottern ore

Mining; General mining

A term used in early metallurgical practice for an ore that becomes vitrified by heat, like the glazing of earthenware.

blue metal

Mining; General mining

A term used in England for a hard bluish-gray shale or mudstone lying at the base of a coalbed and often containing pyrite.

pike

Mining; General mining

A term used in England for any summit or top of a mountain or hill, esp. one that is peaked or pointed. Also, a mountain or hill having a peaked summit.

land-pebble phosphate

Mining; General mining

A term used in Florida for a pebble phosphate occurring as pellets, pebbles, and nodules in gravelly beds a few feet below the ground surface. It is extensively mined.

land pebble

Mining; General mining

A term used in Florida for a pebble phosphate occurring as pellets, pebbles, and nodules in gravelly beds a few feet below the ground surface. It is extensively mined.

matrix

Mining; General mining

A term used in Florida for a pebble phosphate occurring as pellets, pebbles, and nodules in gravelly beds a few feet below the ground surface. It is extensively mined.