Resembling spar, esp. in regard to having good cleavage. Syn:spathose
A native ferrous carbonite, also called siderite, containing 48% iron and
usually traces of manganese. It is the best native ore for making steel
tools by the direct method formerly used. See also:siderite
Sandstrom
See:siderite
Widely distributed crystallization of sparry carbonates, such as calcite
and dolomite; development of relatively large sparry crystals that have
good cleavage. AGI
See:spathic
Carbonate of iron, FeCO3 . See also:siderite
See:spall
See:sledger
See:spontaneous potential curve
a. One of several types of fishing tools designed to be driven and wedged
inside of bits, rods, etc., lost in a borehole. CF:fishing tap
Long
b. A rodlike fishing tool having a barbed-hook end, used to recover rope,
wire line, and other materials from a borehole. Long
c. Eng. A wooden pump rod cut into lengths of about 40 ft (12 m) , and,
for heavy work, often measuring 16 in (40.6 cm) square. Wrought iron
spears are also used. Fay
a. The point of convergence of two cross faces set off in the form of the
letter V. TIME
b. A conical head on a wire-line core barrel, engaged by the dogs on the
overshot assembly for the purpose of removing the inner tube of the core
barrel from a borehole. Long
A marcasite in twin crystals resembling the head of a spear.
See:marcasite
See:special rounds
A wire rope composed of 6 strands of 37 wires each. Lewis
Sometimes used to designate a very high quality or grade of drill
diamonds. Long
A steel containing alloys that provide special properties, such as
resistance to corrosion or to heavy load. Also called alloy steel.
Hammond
A mineral distinguished from others by its unique chemical and physical
properties; it may have varieties. AGI
Word used with a special meaning in mineral dressing, where minerals of
the same species often exhibit differences in their reactions. "Specific
to" warns the observer that the process in hand is empirical in some ways,
designed to apply to one specific orebody. Pryor, 3
The chemical bond between glued or cemented surfaces as distinct from any
form of mechanical bond. Hammond
Selective adsorbing action. Pryor, 3
A measure of the vibrational energy absorbed by the rock and may be
considered to be a measure of the internal friction. It is determined by
the sharpness of resonance that is evident when a specimen is vibrated
through a range of frequencies centered on the fundamental longitudinal
resonant frequency. Damping of the dry type (coulomb damping) is commonly
assumed to be independent of the velocity, and thus independent of the
frequency, and is somewhat sensitive to moisture content.
Syn:coulomb damping