Coal

Coal

Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.

Industry: Energy

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Coal

Thermal

Energy; Coal

A term used to identify a type of electric generating station, capacity, capability, or output in which the source of energy for the prime mover is heat.

Producer

Energy; Coal

A company engaged in the production and sale of natural gas from gas or oil wells with delivery generally at a point at or near the wellhead, the field, or the tailgate of a gas processing plant. For ...

Screenings

Energy; Coal

The undersized coal from a screening process, usually one-half inch or smaller.

Total discoveries

Energy; Coal

The sum of extensions, new reservoir discoveries in old fields, and new field discoveries, that occurred during the report year.

No. 2 diesel fuel

Energy; Coal

A distillate fuel oil that has a distillation temperature of 640 degrees Fahrenheit at the 90-percent recovery point and meets the specifications defined in ASTM Specification D 975. It is used in ...

Pregnant solution

Energy; Coal

A solution containing dissolved extractable mineral that was leached from the ore; uranium leach solution pumped up from the underground ore zone though a production hole.