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

Cedarite

Mining; General mining

A pale-yellow to dark-brown variety of retinite (amber) in decayed wood at Cedar Lake, MB, Canada.

Chrysolithus

Mining; General mining

A pale yellowish-green variety of beryl.

Wash pan

Mining; General mining

A pan for washing pay dirt in placer mining.

A percussive boring system comprising a closed-in derrick over the crown pulley of which a steel rope is passed from its containing drum. The boring tools are suspended from the end of the rope and ...

Fluting

Mining; General mining

A peculiar method of surface decay by which granite or granite gneisses are left with a corrugated or fluted surface. In a large subangular fragment of granite, one side contains a dozen of these ...

Jetting drill

Mining; General mining

A percussive drill for prospecting through superficial deposits. The drill is given a short stroke, 10 to 20 cm, and rotated by hand. Water is pumped down through the hollow steel rods and escapes ...