Geological Magazine; January 2008; v. 145; no. 1;
p. 105-147; DOI: 10.1017/S0016756807003925
© Cambridge University Press (CUP)
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Figure 13. Cluster analysis of palynological assemblages from Tytherington plus the Clifton Suspension Bridge ‘FPC’ sample. Palynological data were recalculated to include only the major elements (Ricciisporites tuberculatus, Ovalipollis pseudoalatus, Rhaetipollis germanicus, the Circumpolles pollen, Rhaetogonyaulax rhaetica and Cymatiosphaera polypartita). A number of different methods were used to make the similarity matrix and perform the cluster analysis. These generally gave robust results.The illustrated dendrogram was clustered using UPGMA and a Cosine 
similarity measure using the MVSP© program (Kovach Computer Services). The analysis shows three clear assemblage groups in the fissure deposits. The two palynological samples that were in a limestone lithology are marked L, that is, FP13.1L and FP16.1L.
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