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Coal Point-source and Chemical Data (COALQUAL)

March 29, 2019
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Data containing geodetic location, field observations, sample analyses, bed thickness; lithology; depth of burial, moisture, ash, and sulfur content, heat value, and major-, minor-trace-element contents.

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The U.S. Geological Survey coal quality (COALQUAL) database version 3.0

Since the mid-1970s, the U.S. Geological Survey (USGS) has maintained a coal quality database of national scope named USCHEM, which currently contains data for over 13,000 samples. A subset of the USCHEM database called COALQUAL Version 1.3 was initially published in 1994 and was followed by Version 2.0 in 1997. Version 3.0 of the COALQUAL database represents a major editing effort to resolve some

Authors
Curtis A. Palmer, Charles L. Oman, Andy J. Park, James A. Luppens
By
Energy Resources Program, Geology, Energy & Minerals Science Center

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