A white pigment composed of a mixture of barium sulfate, zinc sulfide, and
zinc oxide. Hess
A naturally occurring mixture of spodumene and feldspar. USBM, 6
a. The solid outer portion of the Earth, as compared with the atmosphere
and the hydrosphere. AGI
b. In plate tectonics, an outer layer of great strength relative to the
underlying asthenosphere for deformation at geologic rates. It includes
the crust and part of the upper mantle and is about 100 km thick.
AGI
An area or surface of uniform sediment, sedimentation, or sedimentary
environment, including associated organisms. CF:lithofacies
AGI
a. A rock defined on the basis of certain selected physical characters.
AGI b. This term was proposed by C.A. Seyler in 1954 in a communication to the
Nomenclature Subcommittee of the International Committee for Coal
Petrology to designate the different macroscopically recognizable bands of
humic coals. These bands were described by M.C. Stopes in 1919 as the four
visible ingredients in banded bituminous coal. The following macroscopic
bands are distinguished in humic coals: vitrain, clarain, durain, and
fusain. IHCP
Wood opal in which the original woody structure is observable; also
petrified (opalized) wood. Also spelled lithoxyle; lithoxylite;
lithoxylon. See also:wood opal
Blue triclinic mineral, KNaCuSi4 O10 .
A blue dyestuff that turns red when treated by an acid and remains blue
when treated by an alkali. Crispin
Absorbent paper dipped into a solution of litmus. Used to test solutions
to determine whether they are acid or alkaline. Standard, 2
Having the characteristic of a layered rock, the laminae of which have
been penetrated by numerous thin, roughly parallel sheets of igneous
material, usually granitic. Etymol: French, bed-by-bed.
CF:injection gneiss; injection metamorphism. AGI
Trade name for a small exploder that employs a manually operated
electromagnetic generator as its source of power. It is approved for
firing single shots in gassy mines and is in widespread use.
Syn:one-shot exploder
A jointed iron nozzle used in hydraulic mining.
See also:hydraulic monitor
a. Corn. A sump. Fay
b. An underground shaft, sunk from a horizontal drift. A winze.
Fay
Of or pertaining to a shore. A coastal region. Webster 2nd
A current generated by waves breaking at an angle to the shoreline and
that usually moves parallel to and adjacent to the shoreline within the
surf zone. See also:longshore current
a. Applied to the movement along the coast of gravel, sand, and other
material composing the bars and beaches. AGI
b. Material moved in the littoral zone under the influence of waves and
currents. AGI
In mine subsidence, the zone that embraces the disturbed strata lying
round about and outside the mined strata. Briggs
A shovel boom that can be lifted and lowered without interrupting the
digging cycle. Nichols, 2
A monoclinic mineral, Pb9 As13 S28 .
Syn:rathite-II
a. In drilling, a variable load suspended on the hoist line. Long
b. In mechanics, a load that is variable, as distinguished from a load
that is constant. Also called dynamic load. Long
c. A load on a structure that may be removed or its position altered.
See also:dead load
d. It may not be a dynamic load, and it does not include wind load or
earthquake shocks. Hammond
A lode containing valuable minerals.