Publications by Tewalt, S.J.
| Title | Publication Year Sort ascending | Abstract | Author | Series | Publisher | |
|---|---|---|---|---|---|---|
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Estimation of lignite resources in the Wilcox Group of central and east Texas using the National Coal Resources Data System | 1991 | Since 1979, the U.S. Geological Survey (USGS) has funded cooperative programs with coal-bearing states in an effort to provide current U.S. coal resource estimates that are calculated by uniform, computerized methods. |
Tewalt, S.J., Jackson, M.L.W. | Geological Circular | Bureau of Economic Geology |
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Chemical Characterization of Texas Lignite | 1986 | Statistical analysis of chemical data on Texas Eocene coals revealed startigraphic and geographic trends in lignite quality. Chemical data on near-surface coals wre obtained from various private and public sources. Seams from deep-basin coals were compared. |
Tewalt, S.J. | Geological Circular | Bureau of Economic Geology |
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Estimation of coal resources in Texas Gulf Coast, Ohio northern Appalachian, and Wyoming Powder River Basins: a comparison of statistical approaches | 1983 | Official estimates of United States coal resources published during the past 15 years vary from less than 1.5 to 3.5 trillion metric tons (1.7 to 3.9 trillion short tons). These differences imply that a high degree of uncertainty exists in resource assessment. |
Tewalt, S.J., Bauer, M.A., Mathew, David, Roberts, M.P., Ayers Jr., W.B., Barnes, J.W., Kaiser, W.R. | Report of Investigations | Bureau of Economic Geology |
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Detailed evaluation of two Texas lignite deposits of deltaic and fluvial origins | 1982 | Tewalt, S.J., Bauer, M.A., Mathew, David | Geological Circular | Bureau of Economic Geology |