A monoclinic mineral, (Mn, Mg)13 (Al, Fe)4 Sb2 Si
2 O28 ; in jet-black crystals in limestone at Nordmark and
Laangban, Sweden.
A volcanic rock composed chiefly of melilite, with subordinate olivine and
magnetite and minor leucite and perovskite; a pyroxene-free melilitite.
AGI
A very heavy substance, common in the mines, Derbyshire, U.K. Also spelled
cauk.
See:diaspore
Misspelling of kaersutite.
Synthetic tetragonal silica, SiO2 ; crystallized hydrothermally at
high pressure.
See:zinkenite
A long iron wedge for driving over the top of a pick hilt. Fay
Forest of Dean. Sand forming poor rye soil.
Person in charge of opening and closing the taphole of a blast furnace and
who runs iron at cast. Fay
A division of the Archeozoic rocks of the Canadian Shield. It is older
than the Timiskamian. Also spelled Keewatinian. AGI
A cylindrical container made of steel or some other substance, which
contains 25 lb (11.4 kg) of blasting powder or gunpowder. Any small cask
or barrel having a capacity of 5 to 10 gal (18.9 to 37.9 L). Fay
Amorphous (Zn,Ca)Al2 (PO4 )2 .5H2 O ; a
doubtful mineral species.
A triclinic mineral, Na2-2Dx Hx ZrSi2 O7 .nH
2 O ; forms irregular grains in the Lovozero massif, Kola Peninsula,
Russia.
A variation of kiln. Fay
A six-deck horizontal furnace for calcining sulfide ores. Fay
A multiple-deck roasting furnace for sulfide ore. It is a modification of
the Spence furnace. Fay
A cuprian variety of pentahydrite.
Black lead or wad, Cumberland, U.K.
The rod attached to the top of the drill column in rotary drilling. It
passes through the rotary table and is turned by it, but is free to slide
down through it as the borehole deepens. Also called grief stem.
BS, 9