A diastem or other relatively unimportant sedimentary or stratigraphic
interruption. CF:unconformity; paraconformity.
An anomaly that is superficially similar to a significant anomaly but is
unrelated to ore. Formerly called false anomaly. Hawkes, 2
Tool, made from beryllium-copper or aluminum-bronze, that produces no
sparks, or low energy sparks, when used to strike other objects.
NSC, 1
A wire or fiber cable so constructed as to reduce twisting to a minimum.
Long
A differential that will turn both axles, even if one offers no
resistance. Nichols, 1
A rope wire consisting of 18 strands of 7 wires each, in 2 layers; the
inner layer consists of 6 strands lang lay rope and left lay around a
small hemp core, and the outer of 12 strands regular lay, right-hand lay.
Will carry a load on a single end without untwisting. Hunt
A rope in which the wires are not laid up in strands but in concentric
sheaths, and in opposite directions in the different sheaths, which gives
the rope nonspinning properties. The outer sheaths are composed of
specially shaped interlocking wires, and there is no hemp core in the
rope. Sinclair, 5
A phase transformation not involving structural rearrangement, e.g., Curie
point in magnetism.
A mineral deposit of irregular shape. See also:mass
Any rock whose fabric shows no influence of movement of adjacent grains;
e.g., a rock formed by mechanical settling. Some rocks are transitional
between a tectonite and a nontectonite. AGI
A monoclinic mineral, Na0.33 Fe3+2 (Si,Al)4
O10 (OH)2 .nH2 O ; smectite group; expansive, a
swelling clay; earthy; occurs in vesicles and veins in weathered basalt
and as an alteration product of volcanic glass. Syn:pinguite
called chloropal; gramenite; morencite.
A flow the velocity of which is undergoing a positive or negative change.
If the flow is constant it is referred to as uniform flow.
Seelye, 1
A relative term as applied to ceramic products based on the water
absorbing characteristics; i.e., brick, tile, etc., which absorb water in
excess of that given by the specifications would be described as
nonvitreous. See also:impervious; vitreous; semivitreous.
See:nonvitreous
Coal having a weathering index, as defined by U.S. Bureau of Mines
standards, of less than 5%. AGI
a. A term used in the flotation process and applied to certain metallic
minerals that are not wetted with water but are easily wetted with oil.
Fay
b. As used by diamond-bit setters, a diamond inset in a metal or alloy
that has not adhered to or wetted the surface of the diamond. Long
Trade name for boron carbide, an artificial abrasive; chemical formula,
BC. It is markedly harder than silicon carbide and second only to diamond.
AIME, 1
An orthorhombic mineral, (La,Ce)(Sr,Ca)Na2 (Na,Mn)(Zn,Mg)Si6
O17 ; forms pale brown crystals on the Kola Peninsula, Russia.
A coarse-grained plutonic rock containing basic plagioclase (labradorite)
as the chief constituent and differing from gabbro by the presence of
orthopyroxene (hypersthene) as the dominant mafic mineral.
CF:hypersthenite
a. The theoretical mineral composition of a rock expressed in terms of
normative mineral molecules that have been determined by specific chemical
analyses for the purpose of classification and comparison; the theoretical
mineral composition that might be expected had all chemical components
crystallized under equilibrium conditions according to certain rules. Adj:
normative. See also:normative mineral; norm system. CF:mode
AGI
b. Optimum operating condition of one or more controlled characteristics
in a process such as continuous ore treatment. Pryor, 3
a. Of or pertaining to a solution having a concentration of 1 g-equivalent
weight of solute per liter of solution; commonly used term in analytical
chemistry. See also:normal solution
b. Used to designate aliphatic hydrocarbons, their derivatives, or alkyl
radicals, the molecules of which contain a single unbranched chain of
carbon atoms.