A small volcanic rock, over 64mm, formed through ejection from lava
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Tag: <span>B</span>
The Weight by volume of living organisms in a given space
100 shares
Prospecting by noting characteristics of vegetation
A bluish, compacted soil strata, usually several feet thick and is often indicative of placer minerals
A rock having formed through biological means
A rough technique of assay where the target minerals are oxidized by torch and oxidation states observed
A process for recovering metals from ores using bacterial solution
Usually a deposit that contains positive target indicator minerals without itself containing target minerals
Where an orebody is mined by excavating a cavity underneath the target ore, collapsing the ore into the cavity