A fault that strikes oblique to, as opposed to parallel or perpendicular to, the dominant structure
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Category: <span>O</span>
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
Minerals from the magnesium iron silicate group, (Mg,Fe)2SiO4
An epoch following the Eocene and prior to the Miocene.
A zone of secondary mineralization intersecting a main strike from a perpendicular or other angle
A clear, diatomic gaseous element. Symbol, O