Light iron rods, about 2 ft (0.6 m) long, hinged together to form one
continuous length of 40 to 60 ft (12 to 18 m). They are pushed up inside a
drainage borehole casing to clear stoppages of pebbles and gravel, thus
allowing the drainage water to flow freely. Eng. Min. J., 1
The opening of a glass furnace through which fuel is introduced.
Standard, 2
a. A long, relatively narrow unit of downfolding of sialic crust
considered to be related to mountain-building processes. AGI
b. The downfolded portion of an orogen. Syn:downbuckle
See:orogeny
Said of or pertaining to the forces involved in, or the resulting
structures or features of, tectonics. Syn:geotectonic
A breccia formed as a result of crustal movements, usually developed from
brittle rocks. CF:fault breccia; fold breccia; crush breccia.
AGI
See:lag fault
A map that portrays the architecture of the outer part of the Earth. It is
similar to a structure-contour map, which primarily shows dipping strata,
folds, faults, and the like, but the tectonic map also presents some
indication of the ages and kinds of rocks from which the structures were
made, as well as their historical development. AGI
A branch of geology dealing with the broad architecture of the outer part
of the Earth; i.e., the regional assembling of structural or deformational
features, a study of their mutual relations, origin, and historical
evolution. It is closely related to structural geology, with which the
distinctions are blurred, but tectonics generally deals with larger
features. Adj: tectonic. Syn:geotectonics
See:diastrophism
Any rock whose fabric reflects the history of its deformation; a rock
whose fabric clearly displays coordinated geometric features that indicate
continuous solid flow during formation (Turner and Weiss, 1963). Also
spelled tektonite. AGI
A radar apparatus that detects changes in rock structure, particularly
faults. Nelson
One who studies clastic deformation, flow, and rupture of constituent
materials of the Earth's crust and mantle to make deductions concerning
the forces causing these deformations (changes). DOT
The outer part of the Earth above the level of isostatic equilibrium, in
which the dynamic processes are thought to occur that cause orogenesis
near and at the surface. CF:crust
In founding, an ingate in a mold. Standard, 2
a. Eng. A crossvein meeting a main vein without intersecting it.
b. A sleeve with a third opening in the side, usually at right angles, to
allow a branch line to be connected to the main pipeline. Kentucky
c. A fitting, either cast or wrought, that has one side outlet at right
angles to the run. A single outlet branch pipe. Strock, 1
A rolled steel section in the shape of the letter T, the flat top being
the table. Hammond
See:T-bolt
To pour molten metal from a ladle into ingot molds. The term applies
particularly to the specific operation of pouring either iron or steel
into ingot molds. Also called teeming. ASM, 1
a. A pourer of metal. Standard, 2
b. One who controls the rate of pouring (teeming) stainless steel into
molds. DOT
c. The person who teems or casts the pot of glass. See also:casting
ASTM