The heaviest collected particles or minerals reduced from a larger unclassed volume
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Tag: <span>C</span>
A passage allowing the flow of volcanic magma
The successive chain of mountainous ranges on the western coast of North and South America
A large fracture zone consisting of a series of parallel veins
A reddish metal, symbol, Cu
An ore containing more than one mineral of economic value
A machine for pulverizing rock or other materials
Unconcentrated, unrefined ore
A refractory cupola used to melt minerals or smelt ore
A main support pillar designed to withstand the bulk of overhead weight