Refined metals in the form of a plate, rod or bar
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Category: <span>C</span>
A large and significant region of Precambrian rocks in eastern Canada
A recess in the floor of a mine designed to prevent the leakage of minerals.
The oldest system into which the Paleozoic rock is classified
A substance introduced to a reaction to modify the characteristics of the reaction
A sedimentary ore of secondary accumulation and not unlike a natural cement, it is usually mined for heavy minerals, occurs as reddish-brown to beige or even white calcareous material.
A sudden and extensive geologic event
A drill bit where the diamond set crown has been cast into a mould
The depth of a borehole to where casing is entered
The study or art of mapmaking