Sedimentary rock consisting of rounded pebbles cemented into a solid mass
Sedimentary rock consisting of rounded pebbles cemented into a solid mass
A crushing machine using a tapered gyrating cylinder revolving on its axis within an outer chamber
A compacted mass of mineral matter
A hardened rock-like mixture of sand or gravel, water, and Portland cement
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
A reddish metal, symbol, Cu