A long, narrow excavation made to expose, access or further define mineralization
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Tag: <span>T</span>
A brittle, trigonal mineral. Symbol, Te
A type of igneous rock prone to crystallization forming in cavities
To haul cars of ore or waste in a mine
A term used to describe affine grained criss-crossed formation of flow lines on rocks
A large tunneling machine capable of drilling large tunnel and room sizes passages in solid rock
An opening and passage into a mine
A hard, brittle, metal. Symbol, W
A part of the arctic and subarctic region unsupportive of larger rooted plants and trees due to permafrost
A light porous, pyroclastic rock