A textural term for rocks in which all or almost all of the mineral
constituents are idiomorphic or euhedral.
a. A worker who places in position and tends the operation of underground
trough conveyors for the transportation of coal or other minerals. These
conveyors are built in sections, and the principal task of the panman is
to move the sections from one position to another. Hess
b. One engaged in dismantling or building conveyors. Also called panner.
Mason
A technique of prospecting for heavy metals, such as gold, by washing
placer or crushed vein material in a pan. The lighter fractions are washed
away, leaving the heavy metals behind in the pan. See also:pan
AGI
A peralkaline rhyolite or quartz trachyte with normative quartz exceeding
10%. It is more mafic than comendite. AGI
a. A type of drawing instrument consisting of rods linked together in the
form of a parallelogram, used for copying a drawing to any required scale.
Hammond
b. The hinged diamond-shaped structure mounted on the roof of an electric
locomotive to collect electric power from an overhead wire.
Hammond
Doorless car of two-way, side-dump design; built in capacities from 4 to
10 yd3 (3.1 to 7.6 m3 ). The car body is reversible and
may be dumped to either side. Dumping is accomplished by means of an
external hoist at the dumping point. Pit and Quarry
Panzer-Forderer snaking conveyor
A very strong, armored conveyor that is moved forward behind a coal plow
by means of a traveling wedge pulled along by the plow or by means of
jacks or compressed-air-operated rams attached at intervals to the
conveyor structure. Sinclair, 5
a. A bluish white, massive New Zealand clay like pipe clay; used for
whitening fireplaces. When hard, it is called papa rock. Etymol:
Polynesian.
b. Sp. A nugget of gold or silver.
c. A nodule of mineral.
A monoclinic mineral, CaCuAlSi2 O6 (OH)3 ; forms blue
crystals; secondary; at Ajo, Pima County, AZ.
A fine-grained, white, kaolinic clay with high retention and suspending
properties, high reflectance, and a very low content of free silica. It is
used for coating or filling paper. AGI
a. Coal in which cuticular matter may be prominent. AGI
b. A variety of brown coal deposited in thin layers like sheets of paper.
Fay
A shale that easily separates on weathering into thin layers or laminae
suggesting sheets of paper; it is often highly carbonaceous. AGI
A crystallized variety of calcite found in thin lamellae or paperlike
plates. Standard, 2
See:para-
a. A prefix applied to the names of metamorpic rocks that have been
derived from sediments; e.g., paragneiss. Stokes
b. Prefix meaning beside or nearby.
c. Indicating a polymorph.
d. Indicating a schist or gneiss derived from a sedimentary protolith.
e. A matrix-rich clastic sedimentary rock.
f. In chemistry, a prefix indicating: (1) an isomeric or polymeric
modification; such as paracyanogen, paraldehyde, etc.; (2) a modification
or a similar compound that is not necessarily isomeric or polymeric; such
as, paramorphine; (3) a benzene diderivative in which the substituted
atoms or radicals are directly opposite each other on the benzene
ring--i.e., occupying the positions 1 and 4--such as paraxylene; or (4) an
inactive isomer produced by a combination of its dextro- and levo-
modifications--such as, paratartaric acid. A Greek prefix meaning beside.
Abbrev., p-. Syn:par-
g. A Greek prefix meaning beside. In the name of a metamorphic rock, such
as paragneiss, it means derived from an original sediment.
Webster 3rd
The shape taken by the curve of a bending moment diagram for a uniformly
distributed load on a beam simply supported. Hammond
An orthorhombic mineral, Fe3+ (SO4 )(OH).2H2 O ;
dimorphous with butlerite: orange; an alteration product of copiapite.
A monoclinic mineral, BaAl2 Si2 O8 ; feldspar group;
pale yellow; dimorphous with celsian; at Candoglia, Italy.
Syn:barium feldspar
Discoloration in minerals from exposure to weather. Standard, 2
An unconformity at which strata are parallel and the contact is a simple
bedding plane. AGI