- Sektör: Mining
- Number of terms: 33118
- Number of blossaries: 0
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The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
A metamorphosed argillaceous limestone with a schistose structure produced by parallelism of platy minerals.
Industry:Mining
A metamorphosed basaltic rock with relict phenocrysts of labradorite in an amphibolitic groundmass. The term was originated by Sederholm in 1899, who named it after Lavia, Finland.
Industry:Mining
A metamorphosed carbonate rock not suitable for use as polished dimension stone (Brooks, 1954). Compare: metamarble; ortholimestone.
Industry:Mining
A metamorphosed gabbro or diabase in which generally fibrous amphibole (uralite) has replaced the original clinopyroxene (commonly augite). It is usually massive but may have some schistosity.
Industry:Mining
A metasomatic rock found at the contact of calcareous rocks with intruded granite and consisting of more than 50% axinite. Other minerals include diopside, actinolite, zoisite, albite, and quartz.
Industry:Mining
A meteorite mineral consisting of the body-centered cubic alpha-phase of a nickel-iron alloy, with a fairly constant composition of 5% to 7% nickel. It occurs in iron meteorites as bars or girders flanked by lamellae of taenite.
Industry:Mining
A meter that records the total quantity of liquid or electricity passing through it.
Industry:Mining
