Mankiller – A dangerously heavy slab of rock that can fall without warning.
Mill – The refining plant in which ore is treated for the recovery of valuable metals. Also, a machine consisting of a revolving drum - for the fine grinding of ores as a preparation for treatment.
Milling Ore - Ore that contains sufficient valuable mineral to be treated by milling process.
Motherlode - The starting place or origin of a metal. A vein which contains the original metal "in place".
Mucker – A mechanized, hand-operated front-loader – that utilizes a scoop to remove ore or debris.
Nugget - A water-worn piece of precious metal, usually implying some size.
Ore - A mixture of ore minerals and gangue from which at least one of the metals can be extracted at a profit.
Ore-bearing - Rock that has some type of ore present in its composition.
Pan or Panning - To wash gravel or rock that have been ground in a pan to separate gold.
Placer - An alluvial deposit (on top of the bedrock) of sand and gravel containing valuable minerals such as gold.
Plant - A group of buildings, and especially to their contained equipment , in which a process or function is carried out; on a mine it will include warehouses, hoisting equipment, compressors, repair shops, offices, mill or concentrator.
Portal - The surface entrance to a tunnel or adit.
Pockets - These are cavities in the earth, filled with ore, or a rich deposit of gold.
Prospect - A mining property, the value of which has not been proved by exploration.
Pyrite - A hard, heavy, shiny, yellow mineral - a sulphide of iron - sometimes called "fools gold".
Quartz - One of the most common of all rock-forming minerals and one of the most important constituents of the earth's crust. Quartz may be transparent, translucent, or opaque; it may be colorless to colored. Used in the manufacture of electronics, often said to store paranormal energy.
Raise - A vertical or inclined underground working that has been excavated from the bottom upward.
Recovery - The percentage of valuable metal in the ore that is recovered by metallurgical treatment.
Rib – The side walls of the mining tunnel.
Rock Bolting - The act of consolidating roof strata by means of anchoring and tensioning steel bolts in holes especially drilled for the purpose.
Rock Burst - The sudden failure of walls or pillars in a mine caused by the weight of pressure of the surrounding rocks, and accompanied by a violent release of energy.
Kristen sees the opening in the side of the mountain for herself and makes a startling realization about the way the mine aligns with Baker City.
At the Crescent, the men blast down the barriers in the mysterious drift and make an astonishing discovery, while Kristen and Stan confront a dark presence at the old Octave Mine in Arizona.
Stan and Eddie check in with mine owner Larry to outline their prospects for what little remains of the mining season.