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Mineral mining

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

Contributors in Mineral mining

Mineral mining

rabble rake

Mining; General mining

A rabble of simple construction for use by hand.

mechanical rabble

Mining; General mining

A rabble worked by machinery.

lamp rack

Mining; General mining

A rack upon which electric cap lamp batteries are placed to be charged.

tectonometer

Mining; General mining

A radar apparatus that detects changes in rock structure, particularly faults.

rosette

Mining; General mining

A radially symmetric, sand-filled crystalline aggregate or cluster with a fancied resemblance to a rose; formed in sedimentary rocks by barite, marcasite, or pyrite.

desert rose

Mining; General mining

A radially symmetrical group of crystals with a fancied resemblance to a rose, formed in sand, soft sandstone, or clay. These crystals are commonly calcite, less commonly barite, gypsum, or ...

botryolite

Mining; General mining

A radiated, columnar variety of datolite with a botryoidal surface.

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