The correction that must be applied to a tape if it is being used at a
tension different from that at which it was standardized.
See also:tape corrections
Drilling with part of the weight of the drill string supported by the
drill swivel head or suspended on a drilling line, as opposed to drilling
with the entire weight of the string imposed on the bit.
See also:tension-control cylinder; weight indicator. Long
The tail end or receiving end of a belt conveyor. It consists of a return
drum carried in a boxlike structure. A scraper, plow, or brush is attached
to remove as much as possible of the spillage on the bottom belt before it
passes on to the return drum. The tension end is drawn back by two
sylvesters attached to staking anchor props; this enables adequate, but
not excessive, tension to be imparted to the belt. See also:sylvester;
tailend. Sinclair, 5
a. A generic term for any fault caused by tension. AGI
b. Geological fault due to tension, which separates rock strata; unlike
gravity or normal fault, since strata may reappear on other side of gap
caused by fall of intervening section to lower level when fissure opened.
Pryor, 3
The side of a beam in tension, being the lower side in the general case of
a simple beam supported at both ends. Hammond
a. A fracture that is the result of tensional stress in a rock.
CF:shear fracture
AGI
b. A fracture that is the result of stresses that tend to pull material
apart. Billings
c. See:subsidiary fracture
A type of jack equipped with a jackscrew for wedging against the roof,
which also has a ratchet device for applying tension on a chain to be
attached to the tail or foot section of a belt conveyor. The jacks and
tension chains pull the tail section back until the belt is at the proper
tension. Jones, 1
A joint that is a tension fracture. Syn:cross joint; tension fracture.
A chain application in which linear motion is not continuous in direction.
Jackson, 1
The surface area affected by tensile strain. CF:compression zone;
neutral zone; tension. Nelson
A conical hill or knoll resembling a Native American tepee; esp. an
isolated, residual hill formed by a capping of resistant rock that
protects the underlying softer material from erosion. Also spelled: teepee
butte. AGI
a. An evaporite consisting of a calcareous crust coating solid rocks on or
just beneath the surface of an arid or semiarid region; a deposit of
caliche. AGI
b. Mex. A volcanic tuff, or a secondary volcanic or chemical nonmarine
deposit, very commonly calcareous. Etymol. Mexican Sp., from Nahuatl
(Aztec) tepetatl, stone matting. AGI
A general term for all pyroclastics of a volcano. AGI
A group of extrusive rocks, of basaltic character, primarily composed of
calcic plagioclase, augite, and nepheline or leucite as the main
feldspathoids, with accessory alkali feldspar; also, any member of that
group; the extrusive equivalent of theralite. With the addition of
olivine, the rock would be called a basanite. AGI
Said of a rock resembling tephrite.
A coal-tar pitch, for protecting the outside of steel tubes against
corrosion and bacteria. Osborne
A monoclinic mineral, Hg2 ClO ; yellow; at Terlingua, TX.
A sharp, local change in the dip of strata or cleavage near a fault. Not
commonly used in the United States. CF:drag
The constant velocity acquired by a particle falling in water or air when
the frictional resistance is equal to the gravitational pull.
See also:equal-falling particles; Stokes' law. Nelson
In mineralogy, the end of a crystal, esp. crystal faces that intercept the
crystallographic axis, as distinguished from a broken or polished end.
Crystals are singly terminated if faces appear on one end as in attached
crystals or ones lacking the symmetry to require faces on both ends to
complete a crystal form; they are doubly terminated if faces appear on
both ends.
Schedule that defines responsibilities and area of activity delegated to
and/or accepted by subsection, department, or subordinate official in
organization working on line-and-staff system of large company where
harmonious cooperation might otherwise be endangered. Pryor, 3