"A field[failed verification] is a mineral deposit containing a metal or other valuable resources in a cost-competitive concentration. It is usually used in the context of ...
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a mineral deposit from which it is convenient to extract its metallic component. The deposits are exploited by mining in the case of solid mineral deposits (such as iron or coal) and extraction wells in case of fluids (such as oil, gas or brines)." - (en.wikipedia.org 09.07.2022)
