A plotting of cumulative cuts and fills used for engineering computation
of highway jobs. Nichols, 1
The tendency for hardened steel to decrease in hardness from the surface
to the center, as a result of the variation in the rate of cooling
throughout the section. Becomes less marked as the rate of cooling
required for hardening decreases; i.e., as the content of alloying
elements increases. CTD
a. One of the three recognized forms in which asbestos fiber is found in
rock deposits. In this form the fibers are usually found intermixed in a
matrix, which forms the orebody. Found mostly in the matrix of the
deposits of the amphibole varieties of asbestos. The rock forming the
orebody is sometimes inclined to be soft, and the fibers intermingled in
such a mass deposit consist of patches of apparent slip-fiber forms.
Indications of disturbed cross-fiber disposition are often discernible.
Sinclair, 7
b. A mass aggregate of interlaced, unoriented, or radiating fibers of
chrysotile serpentine asbestos.
Diagram used in construction work to show the location of digging and
filling sites, and the distances over which earth and materials are to be
transported. Pryor, 3
An orthorhombic mineral, PbO ; dimorphous with litharge; prismatic
cleavage; soft; yellow; occurs in oxidized zones of lead ore deposits.
Syn:lead ocher
A massive topographic and structural feature, esp. in an orogenic belt,
commonly formed of rocks more rigid than those of its surroundings. These
rocks may be protruding bodies of basement rocks or younger plutonic
bodies. Examples are the crystalline massifs of the Helvetic Alps, whose
rocks were deformed mainly during the Hercynian orogeny, long before the
Alpine orogeny. AGI
Fr. Pillar in longwall workings. Fay
a. Said of a mineral deposit (esp. of sulfides) characterized by a great
concentration of ore in one place, as opposed to a disseminated or vein
deposit.
b. Said of any rock that has a homogeneous texture or fabric over a wide
area, with an absence of layering, foliation, cleavage, or any similar
directional structure. See also:massive rock
c. Said of a mineral that is physically isotropic; i.e., lacking a platy,
fibrous, or other structure. CF:amorphous
Very thick homogeneous stratification in sedimentary rocks.
Outpouring of lava from a line or system of fissures, so that vast areas
have become covered by nearly horizontal sheets of extrusive flows.
If the crystalline grains are so small that they cannot be distinguished
except under the high magnification of a microscope, the structure is
described as compact and the mineral as massive. CMD
Any pluton that is not tabular in shape.
Isotropic, homogeneous rock with a strength that does not vary appreciably
from point to point. Typical examples are igneous rocks such as granite
and diorite; metamorphic rocks such as marble and quartzite; and some
thick-bedded sedimentary rocks. See also:massive
The unit movement of a portion of the land surface; specif. the
gravitative transfer of material down a slope. Syn:mass-wasting
AGI
The sum of the neutrons and protons in a nucleus. It is the nearest whole
number to the actual atomic weight of the atom. Lyman
A road profile showing cut and fill in cubic yards or meters.
Nichols, 1
Simultaneous exploding of charges in all of a large number of holes, as
contrasted with sequential firing with delay caps. Nichols, 1
Positive ray spectra obtained by means of a mass spectrograph. In such
spectra the images due to positive ray particles of different masses are
spaced according to the masses of the particles; i.e., according to their
atomic weights. CTD
An instrument for producing and measuring, usually by electrical means, a
mass spectrum. It is esp. useful for determining molecular weights and
relative abundances of isotopes within a compound. AGI
See:wet unit weight
See:mass movement