A hardened rock-like mixture of sand or gravel, water, and Portland cement
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Category: <span>C</span>
A processing machine that assists in the separation of particles by weight and density
The heaviest collected particles or minerals reduced from a larger unclassed volume
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
The outer layer of the Earth including continental and oceanic crust
A machine for pulverizing rock or other materials
Unconcentrated, unrefined ore
A refractory cupola used to melt minerals or smelt ore