Fig. 4
From: Jan Steen’s ground layers analysed with Principal Component Analysis

Multi-block PCA on elemental and pigment data of bottom ground layer. Scores (a) and loadings (b) on PC3 and PC4
From: Jan Steen’s ground layers analysed with Principal Component Analysis

Multi-block PCA on elemental and pigment data of bottom ground layer. Scores (a) and loadings (b) on PC3 and PC4