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

goose dung ore

Mining; General mining

An inferior grade of iron sinter containing silver.

goose silver ore

Mining; General mining

An inferior grade of iron sinter containing silver.

Hungarian cat's eye

Mining; General mining

An inferior greenish cat's eye obtained in the Fichtelgebirge in Bavaria. No such stone occurs in Hungary.

An influence line usually pertains to a particular section of a beam, and is a curve so drawn that its ordinate at any point represents the value of the reaction, vertical shear, bending moment, or ...

fucoid

Mining; General mining

An informal name applied loosely to any indefinite traillike or tunnellike sedimentary structure identified as a trace fossil but not referred to a described genus. It was once considered to be the ...

format

Mining; General mining

An informal rock stratigraphic unit bounded by marker horizons believed to be isochronous surfaces that can be traced across facies changes, particularly in the subsurface; useful for correlations ...

felsitoid

Mining; General mining

An informal term applied to any light-colored igneous rock in which the mineral grains are too small to be distinguished by the unaided eye. Compare: felsite