A branch of geophysics that acquires and interprets airborne or satellite
images of the surface using infrared and visible wavelengths of light.
An orthorhombic mineral, Pb(UO2 )4 (PO4 )2
(OH)4 .7H2 O that may be the mineral dewindtite; at Kasolo,
Zaire.
The breaking of coal into lumps with a minimum of smalls. The relative
slowness of low explosives makes them suitable for rending coal since they
lack the greater shattering power of high explosives. Mason
A dynamite used in blasting and consisting of nitroglycerin, potassium
nitrate, wood pulp, and paraffin or pitch. Webster 3rd
A tetragonal mineral, (Cu,Zn)11 (Ge,As)2 Fe4 S (sub
16) ; pseudocubic; a possible source of germanium. (Not reinerite.)
Kidney-shaped. Said of a crystal structure in which radiating crystals
terminate in rounded masses; also said of mineral deposits having a
surface of rounded, kidneylike shapes. CF:colloform; colloid minerals;
botryoidal. AGI
A method of reclaiming iron and other metals from the waste materials
produced in the smelting of zinc and lead ores. The process differs from
the Krupp-Renn method in that it is a volatilization process for
recovering molten metals in oxide form. The metal vapors are oxidized by
excess air and carried off in the flue gases from which they are
subsequently filtered. Osborne
A compact fibrous variety of talc pseudomorphous after pyroxene; harder
than talc; polishes well; made into ornamental objects; in northern New
York and Canada.
a. The amount paid by a coal mining operator to the owner of the coal for
each ton of coal mined and usually expressed in cents per ton.
b. In mining leases, words used interchangeably to convey the same
meaning. Ricketts
There are four methods used in reopening sealed-off areas in a mine: (1)
the direct method in which the stoppings are breached and air is
circulated around the district without previous inspection by a rescue
team; (2) the prior-inspection method in which prior inspection of the
whole district by a rescue team is followed by circulation of air around
the district; (3) the stage method in which the ventilation is restored
and the enclosed gases are removed in successive stages; and (4) the
partial-reopening method which is adopted when it is required to recover
part of a district but leave the remainder sealed off. Sinclair, 1
A worker whose duty it is to repair tracks, doors, brattices, or to reset
timbers, etc., under the direction of a foreman. Also called repairer.
Zern
Crystal twinning involving more than two individuals.
Syn:multiple twin
cyclic twinning.
Hydrogen atoms in acid molecule that can be replaced by those of metal.
Pryor, 3
Diamond inset plates and other geometric forms fastened to and/or
supported by the bit blank by brazing or mechanical locking so that in
drilling they may be replaced when diamond wear exceeds a specified
amount. Long
A central interchangeable pluglike portion of a noncoring bit protruding
or leading the outside portion of such bits. See also:pilot
Long
a. Change in composition of a mineral or mineral aggregate, presumably
accomplished by diffusion of new material in and old material out without
breakdown of the solid state. AGI
b. A process of fossilization involving substitution of inorganic matter
for the original organic constituents of an organism. AGI
See:reset bit
A mineral deposit that has been formed by deposition from mineral
solutions taking the place of some earlier, different substance.
A device consisting of a united pair of iron plates hinged to shoes
fitting over the rails to replace, on the track, derailed railway rolling
stock. Also used for mine cars. Fay
A filling of mineral material deposited by percolating ground waters in
external molds, thus reproducing the original exterior of the fossil shell
or other object, with its exact size and shape. AGI
Taking each sample in a number of subsamples by putting increments in turn
into different containers, in order to estimate the sampling accuracy. The
same total weight of sample is collected whether or not replicate sampling
is employed. BS, 2