A set of rolls or any apparatus for making thin plates of metal, such as
gold, preliminary to beating. Standard, 2
The adjustable roller in a rolling mill whereby the thickness of rolled
metal sheets is regulated. Standard, 2
a. The formation of a lamina or laminae. AGI
b. The state of being laminated; specif. the finest stratification of
bedding, typically exhibited by shales and fine-grained sandstones.
AGI
c. A laminated structure. AGI
Of rocks, bedding in layers less than 1 cm thick; formation with thin
layers that vary in grain or composition. Pryor, 3
a. Partings in coal seams. Arkell
b. N. of Eng. A collier's term for accidents of almost every description
to people working in and about the mines. A variation of lame, to cripple
or disable. Fay
a. See:safety lamp
b. A small handheld electrical device that produces an intense ultraviolet
radiation, called "black light." See:black light; fluorescent lamp.
Long
c. An electrical lamplike device producing intense ultraviolet radiations
for visually examining drill cores or rock specimens for the presence
and/or abundance of fluorescent minerals. Long
Wad containing 4% to 18% copper oxide and commonly cobalt.
Syn:cupreous manganese
a. A place above ground where the safety and cap lamps are maintained,
before being handed to the workers.
b. See:lamp room
See:lampman
A means for supporting a flame safety lamp on a tripod to provide a sight
for surveying. BS, 7
See:lamp cabin
In prospecting, use of a portable ultraviolet lamp to reveal fluorescent
minerals. Pryor, 3
See:lampman
a. The person in charge of the lamp room at a mine responsible for the
maintenance of the safety lamps. Nelson
b. In mining, one who cleans, tests, and repairs lamps used underground by
miners. Also called battery charger; lamp cleaner; lamp-house man; lamp
keeper; lamp repairer; safety-lamp keeper. DOT
A rack upon which electric cap lamp batteries are placed to be charged.
See:lampman
See:oxyhornblende
A group name for dark-colored hypabyssal or extrusive rocks rich in
potassium and magnesium; also, any rock in that group, such as madupite,
orendite, fitzroyite, verite, cedricite, or wyomingite. AGI
A room or building at the surface of a mine provided for charging,
servicing, and issuing all cap, hand, and flame safety lamps held at the
mine. See also:self-service system
A monoclinic mineral, Na2 (Sr,Ba)2 Ti3 (SiO4 )
4 (OH,F)2 . Syn:molengraafite
A group of dark-colored, porphyritic, hypabyssal igneous rocks
characterized by panidiomorphic texture, a high percentage of mafic
minerals (esp. biotite, hornblende, and pyroxene), which form the
phenocrysts, and a fine-grained groundmass with the same mafic minerals in
addition to feldspars and/or feldspathoids; also, any rock in that group.
Most lamprophyres are highly altered. They are commonly associated with
carbonatites. CF:leucophyre