9 Terms
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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
Edgewise conglomerate
Mining; General mining
A conglomerate exhibiting edgewise structure; e.g., an intraformational conglomerate containing elongated calcareous pebbles that are transverse to the bedding.
Penetrometer
Mining; General mining
A cone penetrator equipped with a device that will register the pressure required to drive the cone downward into the formation being tested.
Bell holes
Mining; General mining
A conical cavity in a coal mine roof caused by the falling of a large concretion; or, as of a bell mold.
Stalactite
Mining; General mining
A conical or cylindrical mineral deposit that hangs from the ceiling of a cave.
Conglomerite
Mining; General mining
A conglomerate that has reached the same state of induration as a quartzite.
Hubbard distributor
Mining; General mining
A continuous distributor consisting of a steel open-topped box filled with stone dust. Resting on the surface of the stone dust is a steel plate 1/4 in (0.64 cm) in thickness fitting loosely into the ...
