Sealing the joint of a retort with fire clay. Pryor, 3
A general name used for consolidated rocks composed of silt and/or clay
and of the associated materials which, when mixed with water, form mud;
e.g., shale, mudstone, and calcilutite. The term is equivalent to the
Greek-derived term "pelite." Etymol: Latin lutum, mud. Also spelled
lutyte. See also:rudite; arenite. AGI
Covered with clay; miry. Webster 2nd
A granite characterized by phenocrysts of potassium feldspar and quartz
that enclose clusters of radially arranged acicular tourmaline crystals in
a groundmass of quartz, tourmaline, alkali feldspar, brown mica, and
cassiterite. Its name is derived from Luxulyan, Cornwall. Also spelled:
luxulianite; luxulyanite. Var: luxuliane. AGI
A tetragonal mineral, Cu3 AsS4 ; stannite group; dimorphous
with enargite. Formerly considered an arsenian variety of famatinite.
High explosive based on picric acid, (NO2 )3 C6 H
2 OH , with 10% nitrobenzene and 3% vaseline. Pryor, 3
A touchstone consisting of a compact, extremely fine-grained, velvet- or
gray-black variety of jasper. Etymol: Greek Lydia, ancient country in Asia
Minor. Syn:lydite; touchstone; basanite. AGI
See:Lydian stone
See:double parting
An allowance to miners on piecework who are rendered idle during a shift
owing to circumstances beyond their control, such as a breakdown in power
services, or supplies of empty cars. Nelson
See:footwall
Green iridescent labradorite.
a. Dark blue iolite variety of cordierite.
b. Dark blue sapphires in Sri Lanka.
a. Condition of solid-liquid mixture in which surface-active molecules
that contain two or more groups have both an affinity for the phase in
which one group is dissolved, and a repulsion from this phase for another
group or ion. See also:hydrophilic
b. Having the property of attracting liquids. Pryor, 4
Of, relating to, or having a lack of strong affinity between a dispersed
phase and the liquid in which it is dispersed; systems such as colloidal
metals in water are easily coagulated. Opposite of lyophilic.
Webster 3rd
Adsorption of liquid to a solid surface. Pryor, 3
Scot. An irregularity in the mine roof. A projecting rock in a mine roof
that may fall at any time. Usually used in the plural, and sometimes
spelled lipe. Fay
A flotation process that separates galena and zinc blende by treatment, at
a low temperature, with eucalyptus oil or other frothing agent, and with
agitation or aeration in a neutral or alkaline, but not acid, solution of
the sulfates, chlorides, or nitrates of calcium, magnesium, sodium,
potassium, or mixtures of these substances. Fay
This term is commonly used in and around mines in Indiana and Illinois to
describe a mine sidetrack or a passing track. Hess
See:macle
Crushed stone of regular sizes below 3 in (7.6 cm) for road construction,
commonly with tar or asphalt binder. The sizes below 1 in (2.54 cm) are
more specif. defined as chippings. See also:penetration macadam;
tarmacadam. Nelson