See:lineation
A schistosity due to the parallel alignment of columnar or acicular
crystals in rocks.
Decrease in one dimension of a soil mass, expressed as a percentage of the
original dimension, when the water content is reduced from a given value
to the shrinkage limit. ASCE
See:lineation
A general, nongeneric term for any linear structure in a rock; e.g., flow
lines, slickensides, linear arrangements of components in sediments, or
axes of folds. Lineation in metamorphic rocks includes mineral streaking
and stretching in the direction of transport, crinkles and minute folds
parallel to fold axes, and lines of intersection between bedding and
cleavage, or of variously oriented cleavages. Syn:linear structure;
linear parallelism. AGI
A partition placed in an opening to divide it into intake and return
airways. See also:brattice
A borehole-survey clinometer designed to be inserted between rods at any
point in a string of drill rods. CF:clinometer; end clinometer;
plain clinometer; wedge clinometer. Long
An imperfection in crystal structure characterized by an atomic layer
extending part way into a crystal structure. CF:crystal defect;
edge dislocation.
Gold foil backed with other metal.
A term used in quarrying to describe the method of drilling and broaching
for the primary cut. In this method, deep holes are drilled close together
in a straight line by means of a reciprocating drill mounted on a bar. The
webs between the holes are removed with a drill or a flat broaching tool;
thus a narrow continuous channel cut is made. See also:broaching;
controlled blasting. AIME, 1
Loss in voltage owing to the resistance of conductors conveying
electricity from a power station to the consumer. Hammond
A series of electrodes put out along a straight line on the surface and
electrically interconnected, approx. the condition of continuous
electrical contact with the Earth along that line. Schieferdecker
See:line oiler
See:planimetric map
a. The compass direction of the course a borehole follows. Long
b. A syn. for strike as applied to a rock stratum. Long
c. The direction of the strike. See:strike
The line of sight of the telescope of a surveying instrument, defined as
the line through the rear nodal point of the objective lens of the
telescope and the center of the reticle when they are in perfect
alignment. See also:line of sight
The path that water follows along the impervious surface of contact
between the foundation soil and the base of a dam or other structure.
Syn:path of percolation
a. The direction in which an inclined borehole is pointed. Long
b. The line of greatest inclination of a stratum from the horizontal
plane.
c. The direction of the angle of dip, measured in degrees by compass
direction. It generally refers to true dip, but can be said of apparent
dip as well. Syn:direction of dip
a. The straight line in which a force acts. Standard, 2
b. A curve in a field of force drawn so that at every point it has the
direction of resultant force; specif., a line of magnetic force.
Standard, 2
The shortest distance between the center line of a drill hole and the free
rock face. Fraenkel
The intersection of a stratum with the ground surface.
Schieferdecker