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Small volcanic ejections of solid lava which range from 2 and 64 millimeters in size

Pertaining to the cutting, polishing, carving or setting of precious or semi-precious stones

The mass movement of loose alluvial debris, usually on a steep gradient

A satellite which provides landscapes imagery including patterns, geologic structures

An igneous sedimentary rock, composed of altered mafic and ultramafic minerals

A term used to describe the arrangement of leaves or sheets in a structure, sometimes bound on a side

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 Earth’s surface pushes the overlying rock into a dome shaped structure

Minerals recoverable by dissolution