National coal resource assessment non-proprietary data [electronic resource] : location, stratigraphy, and coal quality for selected tertiary coal in the northern Rocky Mountains and Great Plains region / by R.M. Flores ... [et al.].
Imprint
[Reston, Va.?] : U.S. Dept. of the Interior, U.S. Geological Survey, 1999.
Microsoft Excel spreadsheet files, PDF and Word files containing composite stratigraphic columns showing assessed coal within regions.
Summary
Non-proprietary data from more than 18,000 oil and gas wells, coal drill holes, and outcrop measured sections collected from the Powder River, Williston, Hanna, Carbon, and Greater Green River basins.
Bibliography
Includes bibliographical references (documentation file, p. 9-12).