U.S. Geological Survey coal quality (COALQUAL) database: Version 2.0

January 1, 1997

The USGS Coal Quality database is an interactive, computerized component of the NCRDS. It contains comprehensive analyses of more than 13,000 samples of coal and associated rocks from every major coal-bearing basin and coal bed in the U.S. The data in the coal quality database represent analyses of the coal as it exists in the ground. The data commonly are presented on an as-received whole-coal basis.

Publication Year	1997
Title	U.S. Geological Survey coal quality (COALQUAL) database: Version 2.0
DOI	10.3133/ofr97134
Authors	L. J. Bragg, J. K. Oman, S. J. Tewalt, C.L. Oman, N. H. Rega, P. M. Washington, R. B. Finkelman
Publication Type	Report
Publication Subtype	USGS Numbered Series
Series Title	Open-File Report
Series Number	97-134
Index ID	ofr97134
Record Source	USGS Publications Warehouse

U.S. Geological Survey coal quality (COALQUAL) database: Version 2.0

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