Publication Date: Sun Jan 01 00:00: Research Org.: Kentucky Univ., Lexington (USA) OSTI Identifier: 5369148 Report Number(s): DOE/PC/30223-12 ON: DE84007892 DOE Contract Number: FG22-80PC30223 Resource Type: Technical Report Resource Relation: Other Information: Portions are illegible in microfiche products. 42 references, 19 figures, 9 tables.Īuthors: Graese, A. The lack of significant stratigraphic and geographic trends in the regional data suggests that this mode of deposition was widespread and continued for a long period of time. These swamps were relatively limited in extent and probably occupied the upper reaches of the tidal zone. Like the detrital rocks, the coal seams are also irregularly distributed and exhibit variable petrographic and chemical properties reflecting changes in the Eh and pH of the coal swamp waters as well as detrital influx into the swamps.
Less common coarse-grained, fining-upward sequences appear to be deposits of meandering channels. Minor fossiliferous shales and limestones suggest a marine influence. Core data indicate that the majority of the Tradewater rocks consist of irregularly distributed, coarsening-upward, fine-grained detrital material which was deposited in shallow bodies of water. These data were then analyzed to determine regional variation as well as vertical variation in single coal columns. Twenty-one cores were examined and ninety-eight coal samples were analyzed for maceral, ash, and sulfur contents. A depositional model for the coals of the Tradewater Formation and associated rock units was constructed as a predictive device for the occurrence of economically important low sulfur coal.
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