A type of igneous rock prone to crystallization forming in cavities
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Tag: <span>T</span>
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 complex, piezoelectric trigonal mineral occurring in numerous colours and chemical structures, frequently used as a gemstone
A map indicating elevation and structure through the use of legends and contour lines
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
A volcanic sedimentary deposits of calcium carbonate
A standard of measurement commonly used for mercantile minerals