Mineral mining

Mineral mining

The extraction of valuable minerals or other geological materials from the earth for economic interests.

Industry: Mining

Contributors in Mineral mining

Mineral mining

A needle, consisting of a steel magnet, similar to that in a miners' dial, but pivoted at the centre so as to be free to rotate vertically. It is used to locate the presence of shallow deposits of ...

Frost crack

Mining; General mining

A nearly vertical fracture developed by thermal contraction in rock or in frozen ground with appreciable ice content. Frost cracks commonly intersect to form polygonal patterns in plan view.

Mineral tallow

Mining; General mining

A naturally occurring soft paraffin wax; forms veinlike masses in ironstone nodules associated with coal-bearing strata, South Wales; in limestone cavities, France.