A deep-well pump operated from the level of the ground above.
Standard, 2
A machine that unloads iron ore from boats and cars, by power, generally
electric. Mersereau, 2
Any of several types of portable conveyors adapted for unloading bulk
materials, packages, or objects from conveyances.
See also:portable conveyor
A short section of trough, designed for insertion in a standard shaker
trough, which will allow the coal to be unloaded at that point by being
diverted to either side by the unloading trough. C-clamps are used to hold
the unloading section in place. Jones, 1
See:liberation
Proprietary flotation collector agent based on emulsified tall oil, fuel
oil, and water-soluble aryl-alkyl sulfonate used to treat hematite ores.
Pryor, 3
See:exsolution
a. Said of a rock specimen whose original position in space, when
collected, is unknown.
b. Said of a rock fabric that shows no ordered spatial arrangement.
CF:preferred orientation
c. Said of a map or surveying instrument whose internal coordinates are
not coincident with corresponding directions in space. Stokes
a. Mining claim to which a deed from the U.S. Government has not been
received. A claim is subject to annual assessment work, to maintain
ownership. Weed, 2
b. A claim that requires $100 of work to be done each year. A claim cannot
be patented until $500 has been spent on it. von Bernewitz
c. A mining claim for which the holder has no patent. Under the Multiple
Surface Use Act of 1955, discoveries of common varieties of sand, stone,
gravel, pumice, cinders, and clay cannot be located as mining claims;
however, it does not affect the validity of a discovery in these materials
based on the presence of other valuable minerals. Lewis
The drifts, tunnels, and crosscuts driven in stone, preparatory to opening
out production faces in a coal seam or orebody. Horizon mining is
characterized by a heavy outlay on the initial unproductive development.
See also:dead work; in-the-seam mining; productive development.
Nelson
An area in which it has not been established by drilling operations
whether oil and/or gas may be found in commercial quantities.
Williams
A mineral that belongs to the owner of the land on which or in which it is
located. The owner of the land is its exclusive owner and can deal with it
freely. Examples include limestone, dolomite, barite, fluorite, fireclay,
plastic clay, glass sand, marble, and gypsum. Stoces
unrestrained compression apparatus
See:unconfined compression appliance
See:rock crystal
a. Applied to minerals that are incapable of crystallizing from rock
magmas in the presence of an excess of silica. Such minerals are said to
be unsaturated with regard to silica and include feldspathoids, analcime,
magnesian olivine, melanite, pyrope, perovskite corundum, calcite, and
perhaps spinel. CF:undersaturated; saturated rock. AGI
b. Applied to air that contains less water vapor than the maximum or
saturation content for the conditions pertaining. Spalding
a. Coal for which no size limits are specified. BS, 4
b. Aust. Run-of-mine coal.
The recovery of a sealed-off mine area that had been sealed to extinguish
a fire. Two general systems may be employed: (1) recovering the fire area
in successive blocks by means of air locks, and (2) reventilation of the
fire area after there is conclusive evidence that the fire has been
extinguished. See also:sealed area
The act or process of removing soil, as in opening a quarry.
Standard, 2
a. A quarry term that refers to all cracks or lines of weakness, other
than bedding planes, that may cause rock to break before or during the
process of manufacture. Various types of unsoundness are known locally as
joints, headers, cutters, hairlines, slicks, seams, slick seams, dry
sewns, dries, and cracks. Fay
b. The condition of a solid metal that contains blowholes or pinholes due
to gases, or cavities resulting from the liquid-to-solid contraction (that
is, contraction cavities). See also:gas evolution
a. Said of a constituent of a sedimentary rock that does not effectively
resist further mineralogic change and that represents a product of rapid
erosion and deposition (as in a region of tectonic activity and high
relief); e.g., feldspar, pyroxene, hornblende, and various fine-grained
rock fragments. AGI
b. Said of an immature sedimentary rock (such as graywacke) consisting of
unstable particles that are angular to subrounded, poorly to moderately
sorted, and composed of feldspar grains or rock fragments. CF:labile
AGI
c. Said of a radioactive substance. CF:stable
See:radioisotope