168 Mining Terms. 
Gaturry. A level or drift; applied chiefly to col- 
liéries. 
GANGUE. Crevice material; vein matter; the base 
material forming the matrix of the ore. 
GasH Vern. A vein which continues for practi- — 
cal purposes only a short distance below the sod, gen- 
erally narrowing as it descends. : 
Grope. A rounded nodule of stone, containing 
a cavity studded with crystals or mineral matter; the 
cavity in such nodule. 
Gneriss. A rock composed of the same constituents 
as granite, but foliated or stratified. 
Gos Fire. Fire in collieries produced by sponta- 
neous combustion. | 
Gop. A metallic element; bright yellow; specific _ 
gravity, 19.34; fusing point, 2016 degrees Fahr. Symbol, 
Au. Atomic weight, 196.6. One ounce pure gold 
coined in U. S. dollars is worth $20.67. 
Gossan. See Iron Hat. 
Gouge. A soft selvage; a clay streak found fol- 
lowing a wall, or a slip or an ore measure. 
Grass. The surface over a mine. Corn. 
Grass Roots. A term used where a working is 
started from, or worked up to, the surface. Amer. 
Granite. <A plutonic crystalline rock, composed 
of feldspar, quartz and mica. 
Gray Copper. Tetrahedrite. An ore containing 
copper 15 to 42 per cent, combined with iron, zine, sil- 
ver, mercury, arsenic and antimony. It varies in color, 
hardness and specific gravity. 
Grus Stake. Provisioning a prospector on a bar- 
gain to share his discoveries. 
Haneine Watt. The upper wall of a vein. 
Heapine. The breast or face of a working. 
Heaprines. The mass of gravel and pay dirt above 
the head of a sluice. 
