native coal

native coal

[′nād·iv ′kōl]
(geology)
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References in periodicals archive ?
The Facilities refine coal waste into a reusable salable product with short prox analyses comparable to that of the native coal.
Since last summer Flynn has been working with residents of the hollows and coal towns along his native Coal River to establish permanent plots for monitoring forest health.
Robert Pfeiffer, LUCA Technologies president and chief executive officer, commented, "Our research on native coal, water and microbial samples from the PRB has determined that PRB coals can produce natural gas in real time.