Any material deposited by pyroclastic movement
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Category: <span>T</span>
The direction of defined mineralization or structure
A mineral comprised of tellurium and another element
A long, narrow excavation made to expose, access or further define mineralization
A brittle, trigonal mineral. Symbol, Te
A volcanic eruption subject to glacial exposure at surface
The state of reduced clarity of liquid, due to the concentration of suspended sedimentary or other particles
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