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 7. Dendrograms produced by cluster analysis of chemical and petrographic data. Unweighted pair-group average method and squared euclidean distances were used in the analysis. All data were standardized prior to analysis. A.) R-mode dendrogram of trace-element, oxide, and ash-yield data (whole-coal basis) B.) Q-mode dendrogram of petrographic data.

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