U.S.G.S. Open-File Report 95-595 - Chapter 2, Figure 5.

Coal Geology of the Paleocene-Eocene Calvert Bluff Formation (Wilcox Group) and the Eocene Manning Formation (Jackson Group) in east-central Texas

Edited by P.D. Warwick and S.S. Crowley

U.S. Geological Survey Open-File Report 95-595

Figure 5. Bar graphs of the major petrographic constituents for the channel sample sets of the 3500 and 4500 beds sampled at the Gibbons Creek mine. Location and lithologic description of samples are given in appendix I. Lithologic symbols are the same as used on figure 3.

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U.S. Department of the Interior, U.S. Geological Survey
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