General mining

General mining

General mining related terms and definitions in minerals and related activities.

Industry: Mining

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General mining

knee pad

Mining; General mining

A protective cushion, usually made of sponge rubber, that can be strapped to the miner's knee.

A protective device that removes dispersoids from the air by physically trapping the particles on the fibrous material of the filter. It offers no protection against gases or vapors, or atmospheres ...

coal barrier

Mining; General mining

A protective pillar of coal.

contact goniometer

Mining; General mining

A protractor for measuring the angles between adjacent crystal faces.

Keweenawan

Mining; General mining

A provincial series of the early Proterozoic in Michigan and Wisconsin.

Pahrump

Mining; General mining

A provincial series of the Precambrian in California.

play of color

Mining; General mining

A pseudochromatic optical effect resulting in flashes of colored light from certain minerals, such as fire opal and labradorite, as they are turned in white light. Periodic spacings of phases with ...