The extent of mineralization by size and value, calculated by sound volumetric procedures
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Category: <span>R</span>
Samples large enough to contain a similar percentage of mineral constituents of the host rocks from which it was removed
Rocks transformed by the replacement of eroded or precipitated minerals, by the introduction of newly deposited minerals and while retaining a high percentage of its original form
The time lapse between volcanic eruptions
Water that drains from a flood plain, or higher structure into streams, rivers, or other channels
The red, gemstone variety of corundum Al2O3. Sapphires represent the blue variety of the same substance
A soft, silvery-white, metal. Symbol, Rb
A loose mass of rock fragments
See Net Smelter Return
A unit of measuring exposure doses of X-ray or gamma radiation