See:divining rod
a. A rock-cutting tool or bit, used to deflect a borehole, that has an
articulated pilot part, which also can be attached to a knuckle-jointed
device and coupled to the bottom end of a drill string. Also called
whipstock. Long
b. Nickname for hand-rotated stoper drill.
A monoclinic mineral, Mg5 (BO3 )O(OH)5 .2H2 O;
colorless; forms pseudohexagonal prisms; at Commercial quarry,
Crestmore, CA.
Lower or upper lower Eocene. AGI
a. A borehole and/or the act of drilling a borehole in an unproved
territory where the prospect of finding anything of value is questionable.
It is analogous to a prospect in mining. Long
b. A mining company organized to develop unproven ground far from the
actual point of discovery. Any risky venture in mining.
The drilling of boreholes in an unproved territory. Also called: cold
nosing; wildcatting. Long
a. An individual or corporation devoted to exploration in areas far
removed from points where actual minerals or other substances of value are
known to occur. Also called cold noser. See also:wildcat
b. One who locates a mining claim far from where a deposit has been
discovered or developed.
a. An area or tract of land that is uncultivated and uninhabited by
people.
b. North American stage: Middle Ordovician (above Porterfield, below
Barnveld; it includes uppermost Black River and Rockland rocks).
c. Mottled red and gray grit at Forest of Dean, U.K.
A heat of molten steel that is boiling violently, and so, if poured,
honeycombs an ingot with contained gases. Webster 2nd
See:sphalerite
a. Steel in, or made from, a wild heat. Webster 2nd
b. Said of liquid steel, esp. rimmed steel, that is producing considerable
effervescence. Henderson
A type of bord-and-pillar system of coal mining in which the very narrow
pillars left to support the roof are not recovered. Fay
A method of reducing iron ores in which an electric furnace is fitted with
two or more hollow electrodes, through which the finely divided ore,
intimately mixed with reducing materials, is introduced. Osborne
A form of shaking canvas table that is given a vanner motion.
Liddell
Long-established and widely used form of shaking table; rectangular;
mounted horizontally and can be sloped about its long axis. It is covered
with linoleum (occasionally rubber) and has longitudinal riffles tapering
at the discharge end to a smooth cleaning area, triangular in the upper
corner. A compound eccentric is used to create a gentle and rapid throwing
motion on the table, longitudinally. Sands, usually classified for size
range, are fed continuously and worked along the table with (1) the aid of
feedwater, and (2) across riffles downslope by gravity tilt adjustment and
added wash water. At the discharge end, the sands have separated into
bands: the heaviest and smallest uppermost; the largest and lightest
lowest. The Dodd, Cammet, Hallett, and Woodbury are similar types of
tables. See also:Woodbury table
Trade name for a colloidal bentonite (jelly rock) used in papermaking.
Also spelled Wilconite.
A trigonal mineral, Zn2 SiO4 ; white to pale tints;
fluoresces bright yellow; in zinc deposits in New Jersey, New Mexico,
Africa, and Greenland; a source of zinc. Syn:belgite
a. Eng. An oolitic freestone used for cornices and chimney pieces; also, a
good paving stone, Halston, Northamptonshire. Arkell
b. A massive yellow to green, impure variety of antigorite resembling
jade; used for decorative purposes. It commonly contains specks of
chromite.
c. An old "misspelling" of willemite.
Williams' hinged-hammer crusher
A crusher with a rotating central shaft, carrying a number of hinged
hammers that fly out from centrifugal force, crushing the feed against the
casing. Syn:hinged-hammer crusher
a. An apple-green impure variety of serpentine. See also:jade
Sanford
b. A translucent bright green serpentine, usually containing specks of
chromite, used as a semiprecious stone. Dana, 1
c. An old misspelling of willemite. Dana, 1
A basket-type jig, the basket being suspended in a tank of water.
Pulsations are effected by moving this basket upward and downward by means
of eccentrics. Has been used extensively in the preparation of anthracite
of all sizes and, to a lesser extent, of bituminous coal. Mitchell