See:scoriaceous
An orthorhombic mineral, FeAsO4 .2H2 O ; variscite group;
colorless or pale-green to brown; in gossans, oxidized zones of metal
veins, and around hot springs; a minor source of arsenic.
A process for direct reduction of iron pyrites that depends on the
dissociation of pyrites in the absence of air, and in the presence of
carbon, with the formation of iron and carbon disulfide. Osborne
A monoclinic mineral, (Fe,Mg)Al2 (PO4 )2 (OH)2;
lazulite group; forms a series with lazulite; light blue.
a. A wooden stop-block or iron catch placed across or between the rails of
underground roadways, to keep the cars from running loose, or to hold them
when standing upon an inclined plane.
b. Leic. The lower lift of coal that is wedged up in driving a heading.
c. To dress, as stone, with a pick or picking tool. Standard, 2
a. A wedge or block temporarily fitted to a running rail in order to hold
(scotch) the wheel of a railway vehicle. Hammond
b. One form of gas port in an open-hearth steel furnace; the
distinguishing feature is that it is monolithic, being made by ramming
suitably graded refractory material around a metal template. Dodd
A method of dressing stones either with a pick or with pick-shaped
chisels. Fay
A rounded fragment of agate, carnelian, cairngorm, or other variety of
quartz; found in gravels of parts of Scotland and used as a semiprecious
stone.
A very pure grade of pig iron. Standard, 2
Applied in the gem stone trade to yellow transparent quartzes resembling
Brazilian topaz in color; used for ornamental purposes.
See also:citrine
The erosion of the bed or bank of a river or of a seacoast by the action
of flowing water and waves. See also:scour protection
A process of alternate excavation and refilling of a channel, as by a
stream or the tides; esp. such a process occurring in time of flood when
the discharge and velocity of an aggrading stream are suddenly increased,
causing the digging of new channels that become filled with sediment when
the flood subsides. Syn:washout
A basic slag that attacks the lining of a shaft furnace. Fay
The protection of soil or other submerged material against scour, by the
use of steel sheet pilings, revetment, riprap, or brushwood, or by
combining any such methods as most suited to the site. See also:lining
Hammond
a. One who gathers information about the drilling rig of a rival company
for the benefit of its employer. Also called snooper. Long
b. An engineer who makes a preliminary examination of promising oil and
mining claims and prospects. Long
c. One who goes into a potential area, esp. for oil or gas, to lease or
option the land. Long
Trial bores made to test formations of area being prospected.
Pryor, 3
In stoneworking, a quarryman whose function is to split off large portions
of rock by means of a jump drill and wedges. Standard, 2
A borehole penetrating only the uppermost part of an orebody with the
intention of delineating its surface configuration. Also, a shallow hole
drilled to scout for an indication of ore or to explore an area in a
preliminary manner. Long
Prospecting undertaken in new country in which the first step is to scout
prospect rivers, streams, and creeks by washing gravel obtained from their
beds. Griffith
Corn. A tin-bearing lode.
A former name for rhabdophane.