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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.

Contributors in Coal

Coal

Advance royalty

Energy; Coal

A royalty required to be paid in advance of production from a mineral property that may or may not be recoverable from future production.

Balancing item

Energy; Coal

Represents differences between the sum of the components of natural gas supply and the sum of the components of natural gas disposition. These differences may be due to quantities lost or to the ...

Advances from municipality

Energy; Coal

The amount of loans and advances made by the municipality or its other departments to the utility department when such loans and advances are subject to repayment but not subject to current ...

Barrel

Energy; Coal

A unit of volume equal to 42 U.S. gallons.

Advances to municipality

Energy; Coal

The amount of loans and advances made by the utility department to the municipality or its other departments when such loans or advances are subject to current settlement.

Barrels per calendar day

Energy; Coal

The amount of input that a distillation facility can process under usual operating conditions. The amount is expressed in terms of capacity during a 24-hour period and reduces the maximum processing ...

Adverse water conditions

Energy; Coal

Reduced stream flow, lack of rain in the drainage basin, or low water supply behind a pondage or reservoir dam resulting in a reduced gross head that limits the production of hydroelectric power or ...

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