Ropes of which the layers of wires in strands have all been laid to the
same length of lay. Also known as parallel lay. See also:Warrington
Hammond
a. Said of a crystal having the same or nearly the same diameter in all
directions. CF:anisodesmic; tabular; prismatic. Syn:equidimensional;
isometric. AGI
b. Said of a sedimentary particle whose length is less than 1.5 times its
width. AGI
c. Said of a rock in which the majority of grains are equant. AGI
d. Refers to crystals with roughly equal dimensions. CF:tabular;
lathlike; rodlike; acicular.
A fabric element all of whose dimensions are approx. equal.
CF:linear element; planar element. AGI
The Newtonian law of motion states that the product of mass and
acceleration equals the vector sum of the forces.
Polyhedral crystals formed by spontaneous crystallization in the interior
of a mass of metal in a mold. Distinguished from columnar crystals and
chill crystals. CTD
See:equant
Said of crystals that have the same (or nearly the same) shape.
AGI
A textural term applied to rocks, the essential minerals of which are all
of the same order of size. Holmes, 1
a. A perfect balance of physical forces such that when two or more forces
act upon a body, the body remains at rest. Morris
b. The state in which a reversible chemical reaction is proceeding at the
same rate in each direction. Metastable equilibrium is a steady
unsatisfied state that will undergo further change on addition of the
phase necessary to complete its stability. Physical equilibrium can
connote stable coexistence of a substance in two or more phases, such as
solid, liquid, and/or vapor. Pryor, 3
c. In geology, a balance between form and process, e.g., between the
resistance of rocks along a coast and the erosional force of the waves.
AGI
d. That state of a chemical system in which the phases do not undergo any
change of properties with the passage of time, provided they have the same
properties when the same conditions are again reached by a different
procedure. AGI
See:phase diagram
The composition within any system of two or more crystalline phases that
melts completely at the lowest temperature; the temperature at which such
a composition melts. ACSG, 2
The moisture content of a soil when the water is static. Nelson
The moisture content retained at equilibrium in an atmosphere over a
saturated solution of potassium sulfate at 30 degrees C, and 96% to 97%
relative humidity. When the sample, before such equilibrium, contains
total moisture at or above the equilibrium moisture, the equilibrium
moisture may be considered as equivalent to inherent or bed moisture, and
any excess may be considered as extraneous moisture.
A diagram indicating, preferably by symbols, the units of plant to be used
in the various operational steps carried out within a coal-preparation
plant. BS, 5
a. A line along which water will rise to the same elevation in piezometric
tubes. ASCE
b. A line along which the potential is everywhere constant for the
attractive forces concerned.
A technique used in electrical prospecting requiring artificial currents.
It is based on the principle that if two electrodes are inserted in the
ground and an external voltage is applied across them, there will be a
flow of current through the earth from one electrode to the other. If the
medium through which the current flows is homogeneous in its electrical
properties, the flow lines will be regular and in a horizontal plane,
symmetrical about the line joining the electrodes. Any inhomogeneities in
these properties will cause distortions in the lines of current flow. Such
distortions indicate the existence of buried material with either higher
conductivity than its surroundings, so that it attracts the flow lines
toward itself, or with lower conductivity, so that it tends to force the
lines into the surrounding medium. Dobrin
A surface on which the potential is everywhere constant for the attractive
forces concerned. The gravity vector is everywhere normal to a gravity
equipotential surface; the geoid is an equipotential.
Syn:gravity equipotential surface; niveau surface; level surface.
AGI
Corresponding in geologic age or stratigraphic position; esp. said of
strata or formations (in regions far from each other) that are
contemporaneous in time of formation or deposition or that contain the
same fossil forms. n. A stratum that is contemporaneous or equivalent in
time or character. AGI
An electrical network, the frequency response of which is identical to
that of a quartz oscillator plate. Am. Mineral., 2
a. The diameter of a hypothetical sphere composed of material having the
same specific gravity as that of the actual particle and of such size that
it will settle in a given liquid at the same terminal velocity as the
actual particle. Also called equivalent size. ASCE
b. Twice the equivalent radius. AGI
The quantity of water that would be evaporated by a given apparatus if the
water is received by the apparatus at 212 degrees F (100 degrees C), and
vaporized at that temperature under atmospheric pressure. It is expressed
in kilograms per hour. Strock, 2