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

persilicic

Mining; General mining

A term proposed by Clarke (1908) to replace acidic.

subsilicic

Mining; General mining

A term proposed by Clarke (1908) to replace basic. Compare: persilicic; mediosilicic.

mediosilicic

Mining; General mining

A term proposed by Clarke (1908) to replace intermediate. Compare: subsilicic; persilicic.

metachemical metamorphism

Mining; General mining

A term proposed by Dana to describe metamorphism that involves a chemical change in the affected rocks.

foid

Mining; General mining

A term proposed by Johannsen; derived by contracting the word feldspathoid; used in his classification of igneous rocks to indicate one of the feldspathoidal group of minerals. Compare: feldspathoid

A term proposed by Pettijohn (1957) for a conglomerate that is not a product of normal aqueous flow, but is deposited by such agents as subaqueous turbidity slides and glacier ice; it contains more ...