An instrument for measuring radioactivity, based on emission of light by
certain crystals under impact of gamma rays. AGI
A fault of dislocation, in which two beds are thrown so as to cross each
other. CF:hinge fault; rotational fault. Zern
Scot. Liable to break off in thin fragments, as the roof of a mine
working.
An instrument for determining the degree of hardness of a mineral by
ascertaining the pressure on a moving diamond point necessary to effect a
scratch. Standard, 2
A test to determine the hardness of metals by measuring the rebound from
them of a standard diamond-tipped hammer dropped from a given height.
See also:Shore hardness test; Shore scleroscope. Nelson
A maceral of coal within the inertinite group, consisting of the sclerotia
of fungi or of fungal spores characterized by a round or oval form and
varying size. AGI
The dross of metals. Standard, 2
A monoclinic mineral, CaAl2 Si3 O10 .3H2 O ;
zeolite group; pseudotetragonal; fibrous to acicular; can show wormlike
motion if heated; in cavities in basalt and hydrothermal veins.
A protecting cover or screen; protection; shelter. A metal cover and
holder combined for holding a miner's candle, esp. for hanging on wooden
timbers. Webster 3rd; Fay
High-grade tin requiring little or no dressing. Nelson
Firebricks of a certain standard size. Osborne
a. Diesel- or battery-powered equipment with a scoop attachment for
cleaning up loose material, for loading mine cars or trucks, and hauling
supplies.
b. A large-sized shovel with a scoopshaped blade. Zern
c. Coal miner's shovel; also sometimes used to refer to scraper.
BCI
d. See:scraper bucket
e. A device that gathers ore at feed end of ball mill and delivers it into
the feed trunnion. Pryor, 3
In bituminous coal mining, a laborer who places the cable-drawn scoop of a
scraper loader in position for it to scrape up coal (blasted from the
working face) as it is dragged by the hoisting engine to a point where the
coal is dumped into mine cars. DOT
Similar to a front end loader; a low-profile loader articulating in the
center with a large bucket in front (usually five tons or more) that
transports ore in an underground mine. The operator sits at sideway
controls facing the loader and drives it in either direction as required.
Usually used for loading ore cars, shuttle cars, or hauling directly to an
ore pocket.
A rodlike or stemlike crystallite that terminates in brushes or plumes.
AGI
a. A bill run up by a collier in bad times for the necessaries of life.
Fay
b. See:task
c. To mark with scratches or furrows; e.g., rocks in certain localities
were scored by glacial drift. Standard, 2
a. A bomb-size pyroclast that is irregular in form and generally very
vesicular. In less restricted usage, a vesicular cindery crust on the
surface of andesitic or basaltic lava, the vesicular nature of which is
due to the escape of volcanic gases before solidification; it is usually
heavier, darker, and more crystalline than pumice. The adj. form,
scoriaceous, is usually applied to pyroclastic ejecta. Cinder is sometimes
used synonymously. CF:pumice
b. A local term for melted or partly melted rock surrounding burned-out
coal beds in the Western United States. See also:clinker
Said of the texture of a coarsely vesicular pyroclastic rock (e.g.,
scoria), usually of andesitic or basaltic composition, and coarser than a
pumiceous rock. The walls of the vesicles may be either smooth or jagged.
Also, said of a rock exhibiting such texture. Syn:scoriform; scorious.
CF:vesicular
The separation of gold or silver by heating it to a high temperature with
a large amount of granulated lead and a little borax, in a scorifier. The
gold or silver dissolves in the molten lead, which sinks to the bottom of
the vessel, while the impurities form a slag with the lead oxide that is
produced. Nelson
A bone ash or fireclay crucible somewhat larger than a cupel; used in
assaying and in the metallurgical treatment of precious metals.
Nelson
See:scoriaceous