U.S.G.S. Open-File Report 95-595 - Chapter 5, 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. Dendrogram produced by R-mode cluster analysis of chemical analytical data (on a whole-coal basis) and ash yield for the seven lignite and two shaley coal samples, A1 bed, Calvert mine. Data used for clustering included 59 chemical elements, forms of sulfur, and ash yield. All data was standardized previous to cluster analysis.

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