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PRINCIPAL COMPONENTS ANALYSIS PCA - University of …
strata.uga.eduFe -0.53 -0.09 -0.10 Mg -0.06 0.55 0.44 Mn -0.23 -0.42 0.39 Si -0.51 0.09 -0.06 Note that Fe, Si, and Al have strong negative loading on axis 1, indicating that higher values on PC 1 correspond to lower concentrations of these elements. On PC 2, d18O and Mg have strong positive loadings, whereas Mn has a strong negative loading.