Of, pertaining to, or composed of granulite. AGI
In regional metamorphism, reduction of the components of a solid rock such
as a gneiss to grains. The extreme result of the process is the
development of mylonite. AGI
a. Said of the texture of an igneous rock that results from the regular
intergrowth of quartz and feldspar crystals. The quartz commonly occupies
triangular areas, producing the effect of cuneiform writing on a
background of feldspar. Similiar intergrowths of other minerals, e.g.,
ilmenite-pyroxene, are less common. AGI
b. A mineral intergrowth, e.g., alkali-feldspar and quartz, with angular
planar boundaries resembling cuneiform writing.
Crystals of naturally occurring sylvanite ore; a mixed gold-silver
telluride, occurring in regularity so as to give the appearance of written
symbols. Syn:graphic tellurium
a. An intergrowth of potash feldspar (orthoclase or microcline) and
quartz. Syn:corduroy spar
b. A pegmatite characterized by graphic intergrowths of quartz and alkali
feldspar. CF:intergrowth
See:graphic granite
See:sylvanite
A drawing that shows the sequence of strata. BS, 7
See:sylvanite; graphic gold.
A hexagonal and trigonal mineral, native carbon 4[C] , polymorphous with
chaoite, diamond, and lonsdaleite; scaly, soft, lustrous, metallic; greasy
feel; as crystals, flakes, scales, laminae, or grains in veins or bedded
masses or disseminations in carbonaceous metamorphic rocks; conducts
electricity well, is soft and unctuous; immune to most acids; extremely
refractory. Syn:plumbago; black lead.
The portion of the carbon in iron or steel that is present as graphite;
distinguished from combined carbon. Webster 3rd
Alloy steel made so that part of the carbon is present as graphite.
ASM, 1
A hard, coallike graphite rock interbedded with Precambrian schists.
Syn:graphitoid
Formation of graphite in iron or steel. If graphite is formed during
solidification, the phenomenon is called primary graphitization; if formed
later by heat treatment, it is called secondary graphitization.
ASM, 1
a. Meteoritic graphite.
b. See:graphitite
A clamshell-type bucket having three or more jaws. Nichols, 1
a. A dredge using an orangepeel bucket and operating on the clamshell
principle. Carson, 1
b. See:grab dredger
Scot. The outcrop of a vein. Fay
High explosive; used in mines. Bennett
A miner's term equivalent to the surface. From grass roots down is from
the grass roots to the bedrock.