HANGING WALL: the upper wall of an inclined or dipping vein.
HEADING: same as breast or face of a working.
HORSE: a mass of country rock found in an ore deposit.
INCLINE: a sloping shaft, drift, crosscut or tunnel.
LEAD: same as lode, (pronounced “leed”)
LEDGE: same as lode.
LEVEL: one of a series of drifts or crosscuts, one above the other, in a mine.
LODE: a mineral deposit in place, including veins.
LODE LINE: presumed course of the vein or lode at the surface.
MATRIX: the worthless material in an ore deposit surrounding the valuable minerals.