See:bournonite
See:bournonite
A monoclinic mineral, Al2 Si2 O5 (OH)4 .2H
2 O ; kaolinite-serpentine group; soft, colorless to white; commonly
tinted by impurities. (It is called halloysite in European literature.)
Formerly called hydrated halloysite, hydrohalloysite, hydrokaolin.
A coal face that is at right angles to the main cleats in the seam.
Nelson
A furnace with fuel supplied from the end wall. ASTM
a. Gate at the front end of a car as it travels toward the dump. This gate
has hooks that are engaged at the dump by stirrups that lift it, so that
when the dump pitches forward the coal slides under the uplifted endgate
and is discharged onto a chute or over a dump pile. Zern
b. A gate leading to and at right angles to an end face. Also called
ending. TIME
A mine car constructed with one hinged end that lifts up as the car is
tilted down, permitting the coal, ore, and waste to run out.
See also:mine car
a. A road driven at right angles to the end cleat. Mason
b. Eng. An adit driven in a direction with the grain of the coal.
Fay
A pillar method of working. See also:narrow work
A device for hauling coal in which a chain passes from the engine along
one side of the road, around a pulley at the far end, and back again on
the other side of the road. Empty cars, attached to one side of the chain
by various kinds of clips or hooks, are hauled into the mine; loaded cars
attached to the other side of the chain are hauled out of the mine.
Korson
A rope that moves in one direction, one part of which carries loaded cars
from a mine at the same time that another part brings the empties into the
mine. Zern
An arsenatian variety of vanadinite, intermediate in composition between
vanadinite and mimetite.
The boundary lines of a mining claim that cross the general course of the
vein at the surface. If the side lines cross the course of the vein
instead of running parallel with it, they then constitute endlines. When a
mining claim crosses the course of the lode or vein instead of being along
such lode or vein, the endlines are those that measure the width of the
claim as it crosses the lode. Fay
Extralateral rights are allowed on a claim whose endlines converge, but
they are not allowed in case the endlines diverge. Converging endlines on
a claim would have the disadvantage of giving the owner of such a claim a
continually diminishing length of vein on working down the dip.
Lewis
a. One of the two or more simple compounds of which an isomorphous
(solid-solution) series is composed. For example, the end members of the
plagioclase feldspar series are albite, NaAlSi3 O8 , and
anorthite, CaAl2 Si2 O8 . Syn:minal
b. One of the two extremes of a series; e.g., types of sedimentary rock or
of fossils. AGI
See:endogenetic
Derived from within; said of a geologic process, or of its resultant
feature or rock, that originates within the Earth, e.g., volcanism,
volcanoes, extrusive rocks. The term is also applied to chemical
precipitates, e.g., evaporites, and to ore deposits that originate within
the rocks that contain them. CF:exogenetic; hypogene. Syn:endogene;
endogenic; endogenous. AGI
See:endomorphism
See:endogenetic
See:endogenetic
See:endomorphism