Planks, rods, beams or timbers used to between steel ribbing of an underground structure to fortify support and prevent the picture or rupture of a roof and overlying rocks
Planks, rods, beams or timbers used to between steel ribbing of an underground structure to fortify support and prevent the picture or rupture of a roof and overlying rocks
A chemical agent sometimes used in the process flotation to depress iron minerals
A formation where pressurized volcanic fluid beneath the Earths surface pushes the overlying rock into a dome shaped structure
Minerals recoverable by dissolution
A variety of magnetite with a high percentage of iron, Fe3O4.
A mineral deposit hosted or surrounded by solid rock
Made of stone
The crust and upper mantle of the Earth from its lithosphere
Straight line cut through terrain for the purpose of geophysical mapping of the area
A hydrous form of iron oxide