A royalty paid to the royalty holder, usually contingent on the actual production from a mine, and not subject to the cost of extracting the minerals
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Tag: <span>N</span>
Term used to describe a large shallow water body, usually in fossil deposits where mollusk shells are found in some concentration
A dike filled by compacted sedimentary materials including sand and gravels
A hexagonal feldspathoid mineral, (Na,K)AlSiO4
Lava that cools in the conduit of a volcano