a. Shaping glass by pouring it into or on molds, tables, or rolls.
b. See:casting
Lanc. A cistern (or trough) into which the water is pumped from a mine.
Fay
a. A tetragonal mineral, Na2 B(OH)4 Cl .
b. See:burkeite; gauslinite. From Borax Lake, CA. English
a. Dancing or boiling movement of small particles in a rising fluid
column, when the velocity is too high to let them fall and too low to
sweep them clear. Characteristic zone in hydraulic classifiers.
Pryor, 3
b. The condition of a suspension of solids in an upward-moving current of
water or air, whereby the support given to the particles reduces the
internal friction between them to such an extent that the suspension
acquires fluid or partially fluid properties. BS, 5
An orthorhombic mineral, CuTeO3 .2H2 O ; blue; at the Teine
Mine, Japan.
Fossil hydrocarbon similar to fichtelite. Tomkeieff
Glass spheroid, often with aerodynamic shape, found in strewn fields and
associated with impact craters; each cluster of tektites is named for its
locality, such as moldavites and australites. A tektite has been shaped by
flight through the atmosphere while chilling and ablating and melted by
meteorite impact. See also:water chrysolite
See:tectonite
a. Anglicized from the German telit. Greater fragments of plant tissues,
which are completely soaked with vitrain; i.e., the cell walls as well as
the cell cavities. AGI
b. Used in the names of transitional coal lithotypes, e.g., clarotelain.
AGI
A vertical rectangular timber or steel chute for the transfer of coal to a
lower level. Strips of wood placed crosswise in the chute retard the
downward flow, and the chute is kept full for the same purpose.
Nelson
Said of a hydrothermal mineral deposit located far from its magmatic
source. CF:apomagmatic; cryptomagmatic. See also:telethermal
AGI
A leveling staff used in connection with stadia work.
See also:stadia rod
The remote manual operation of equipment that is usually not within the
direct eyesight of the operator, yet the operator requires and is provided
with sensory information (sight, sound, accelerations, etc.) for effective
manual control.
A combination of positive and negative lenses designed to obtain larger
magnification of distant objects than is possible with ordinary lenses.
Seelye, 2
A drill derrick divided into two or more sections, made so that the
uppermost sections nest successively into the lower sections. In use, the
sections are extended and locked into place to form a tall derrick and
when moved are nested to form a unit length transportable on a single
truck. Long
A mobile electric, hydraulic, four-drill rig for boring blasting holes in
quarries and opencast pits. All drills, percussive and rotary, can be
simultaneously or independently raised, lowered, or slewed, enabling the
rig to serve a working face 32 ft (9.8 m) high and 24 ft (7.3 m) wide.
Nelson
A shaker conveyor trough of two sections, one nested in the other, used
near the face for advancing the trough line without the necessity of
adding either a standard or a short length of pan after each cut. C-clamps
hold the two sections together in any desired length. Jones, 1
That section of a rigid side-framed conveyor that is (1) adjustable in
length, (2) immediately adjacent to the tail section, and (3) so designed
that it forms a continuous framing and cover for the return belt when the
tail section is pulled back to tension the belt. NEMA, 2
A type of conveyor, the length of which may be varied by telescoping frame
members. See also:extendable conveyor
Said of a hydrothermal mineral deposit formed at shallow depth and
relatively low temperatures, with little or no wall-rock alteration,
presumably far from the source of hydrothermal solutions. Also, said of
that environment. See also:telemagmatic
mesothermal; epithermal; xenothermal; leptothermal. AGI
a. This term was proposed by W.J. Jongmans (1935) to designate a vitrinite
showing cellular structure. The Nomenclature Subcommittee of the
International Committee for Coal Petrology decided in 1957 to use the term
telinite only for the cell walls seen in vitrinite. Only in this manner
can telinite be rightly included among the macerals. Telinite shows more
or less clearly defined cell structure (wood, periderm, etc.) sometimes
deformed. The cells are generally filled with collinite, but the structure
is better shown when the cells are either empty or filled by material such
as resinite, fine micrinite, clay minerals, etc. IHCP
b. A maceral of coal within the vitrinite group, characteristic of vitrain
and consisting of cell-wall material. CF:suberinite; xylinite.
AGI