Exposed rock or mineralization at surface
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Category: <span>O</span>
The period of geological time where the Earths crust folded sufficiently to create mountains
A continuous structure of rock having similar metamorphosis or deformation
A length of mineralization in an orebody
A vertical or sloping passage or chute used to convey ore to a connecting level or passage
A defined mass of materials evaluated to contain a known percentage of target minerals
Rocks outlined or extracted for the purpose of extracting target minerals
A mine whereby minerals are extracted from a large open cavity in the earth
An amorphous or microcrystalline mineral, SiO2.nH2O; commonly used as a gem or semi precious stone. Varieties from Lightning Ridge, Australia are among the highest in commercial value due to their striking colour