A white mineral: (Mn,Mg)BO2 (OH). It is isomorphous with
szaibelyite. AGI
Sutton, Steele, and Steele dry table
A concentrator of the Wilfley type in motion, but instead of using water,
stratification is by means of rising currents of air. Heavy grains are
pushed forward by the head motion, while lighter grains roll or flow down
the slope toward the tailing side. Liddell
See:stylolite
A hexagonal mineral, Ca5 (AsO4 )3 F ; apatite group.
A trigonal mineral, SrAl3 (PO4 )(SO4 )(OH)6 ;
beudantite group; at Wermland and Skane, Sweden.
See:celadonite
a. A pistonlike device provided with a rubber cap ring that is used to
clean out debris inside a borehole or casing. Long
b. See:bailer; sand pump.
c. In well drilling, to pull the drill string so rapidly that the drill
mud is sucked up and overflows the collar of the borehole, thus leaving an
undesirably empty borehole. Long
d. Procedure for applying suction within the casing or tubing to draw
fluid from a reservoir rock. Wheeler, R.R.
e. A rod with flexible rubber suction cups working inside the pipe on a
wire line. Wheeler, R.R.
f. A hemp brush used in founding, esp. for holding water, moistening mold
joints, spraying on edges, or spreading blacking on dry-sand molds.
Webster 3rd
a. Newc. A thin layer of stone or refuse coal at the bottom of the seam.
b. N. of Eng. Impure shaly coal or black shale. Arkell
a. A shallow, water-filled hollow produced by subsidence, resulting from
underground mining. AGI
b. A digger's roll of blankets, containing spare clothes, food, etc.
Gordon
A large rectangular block of cast iron used by a blacksmith. It is pierced
through with numerous holes, both round and square in section, for the
reception of work that requires shouldering. Crispin
See:sinkhole
Derb. A loose, broken, or porous place in a vein. It derives its name from
the ease with which water sinks through the loose material.
As applied to a mining claim, to clear a narrow strip along the boundary
line, where the location is on timberland.
Any vehicle with very large, low-pressure tires enabling it to be used in
swamps.
See:bog iron; bog iron ore.
a. In diamond grinding operations, a relatively dry dust derived either
from grinding operations where no coolant or lubricant is applied to the
grinding operation or where the coolant (kerosene, an aqueous solution, or
an emulsion of oil and water) is sprayed on the wheel as a fine mist.
Chandler
b. Fine metallic particles removed by a cutting or grinding tool;
chippings and shavings from soft iron castings used as a reducing agent in
various chemical syntheses. Webster 3rd
c. Scot. A tool for widening boreholes. Fay
d. An intimate mixture of grinding chips and fine particles of abrasive
and bond resulting from a grinding operation. ASM, 1
See:dike swarm
A monoclinic mineral, CaMg(UO2 )(CO3 )3 .12H2
O ; radioactive; green; forms an efflorescence with gypsum,
schroeckingerite, bayleyite, and andersonite.
Derb. A soft clay in the vein.
A body wave that travels through the interior of an elastic medium with
particle motion perpendicular to the direction of propagation. Originally
applied to earthquake seismology, where it was the second (hence: S) type
of wave to arrive at a recording station. Syn:distortional wave;
equivolumnar wave; rotational wave; secondary wave; shear wave.
See also:transverse wave
A sideways movement, such as sidesway, in a structural frame.
Hammond