A method for interpolating spatial sample data and determining values
between data points. A value interpolated for any spatial point is
determined by applying a weighting factor based on distance between the
spatial point and surrounding sample data. Selection of sample points to
include in the calculation may be determined by minimum and/or maximum
distance, azimuth orientation, and the minimum and/or maximum number of
the nearest sample data points. Abbrev. IDS.
The placing of the detonator at the back of the shothole. This is the
usual practice when using delay detonators to minimize the danger of
cutoff holes. See also:direct initiation
priming. Syn:indirect initiation
Law that governs the distance-dependence of physical effects, such as
intensity of light, magnetism, and gravitational force. The effect at a
point due to an emitting source varies as the square of the distance
between them. Pryor, 3
a. Construction of a geophysical model from a set of measurements; e.g.,
using numerous gravity measurements to infer subsurface density
distributions, or using slip vectors and spreading rates to define global
plate motions. Inversion models are inherently ambiguous. AGI
b. A change of crystalline phase brought about by a change in temperature
or pressure; e.g., the inversion between alpha quartz and beta quartz at
573 degrees C.
c. See:center of symmetry
a. A point representing the temperature at which one polymorphic form of a
substance, in equilibrium with its vapor, reversibly changes into another
under invariant conditions. AGI
b. The temperature at which one polymorphic form of a substance inverts
reversibly to another under univariant conditions and a specific pressure.
AGI
c. More loosely, the lowest temperature at which a monotropic phase
inverts at an appreciable rate into a stable phase, or at which a given
phase dissociates at an appreciable rate, under given conditions.
AGI
d. A single point at which different phases are capable of existing
together at equilibrium. Syn:transition point; transition temperature.
AGI
The floor or bottom of the internal cross section of a closed conduit,
such as an aqueduct, tunnel, or drain. The term originally referred to the
inverted arch used to form the bottom of a masonry-lined sewer or tunnel.
AGI
See:overturned
See:overturned
An instrument in which the acceleration of gravity is determined by
measuring the swinging period of a mass that is supported on top of a
spring. Schieferdecker
The plunge of folds, or sets of folds, whose inclination has been carried
past the vertical, so that the plunge is now less than 90 degrees in a
direction opposite from the original attitude. It is a rather common
feature in excessively folded or refolded terranes. AGI
A topographic configuration that is the inverse of the geologic structure,
as where mountains occupy the sites of synclines and valleys occupy the
sites of anticlines. AGI
a. A pipeline crossing over a depression or under a highway, railroad,
canal, etc. The term is common but inappropriate, as no siphonic action is
involved. The term "sag pipe" is suggested as a substitute.
Seelye, 1
b. A pipe or tube in the shape of a siphon, but inverted, as for carrying
water across the depression of a ravine to a lower level.
Standard, 2
c. See:drowned level
The datum level of the lowest part of an invert. Hammond
Flat strut that sometimes is used instead of an arch on the bottom of a
tunnel cross section.
Wavelengths in the electromagnetic spectrum too short or too long to be
detected by the human eye; e.g., ultraviolet and infrared light.
CF:visible light
a. The refractory lining of the stack of a blast furnace.
See also:stack
b. The interior walls or lining of a shaft furnace. Fay
Fireclay brick for use in lining the inwall section of a blast furnace.
ARI
A monoclinic mineral, Ca2 B6 O6 (OH)10 .8H
2 O ; forms large, soft, colorless, tabular crystals associated with
colemanite and other boron minerals in Inyo County, CA; dehydrates to
meyerhoffite.
A hexagonal mineral, AgI ; soft, sectile, waxy; normally a secondary
mineral; in the oxidized zone of silver deposits from primary ores
containing argentite, tennantite or tetrahedrite, and native silver; a
source of silver; in arid regions where volcanic rocks are
common--Southwestern United States, Mexico, Chile, and Broken Hill, New
South Wales, Australia. Formerly called iodyrite or iodite.
CF:chlorargyrite; bromargyrite.
A name to replace iodobromite whose composition is not definite. Used to
designate minerals of the cerargyrite group containing chlorine, bromine,
and iodine, Ag(Cl,Br,I). English