Figure F2. Cluster log, logging units, and downhole logs for Hole 1044A. Factor 1, factor 2, and factor 3 are the factor logs as derived by factor analysis. Based on these three factor logs, the cluster log was calculated. The downhole logging units were defined by the help of the cluster log. In the bottom part of the diagram, the factor loadings with values >0.4 are shown. The factor 1 log is mainly related to lithology (changing clay content and/or clay type, high loading with GR, Th, and K), whereas the factor 2 log is related to porosity (high loading of TNPH and ROMT). GR = gamma ray; K = potassium; Th = thorium; U = uranium; ROMT = density; TNPH = neutron porosity; ATR = electrical resistivity; PEF = photoelectric effect.