This document is a supplement to the article ‘Large near-surface block rotations at normal faults of the Iceland rift: evolution of tectonic caves and dilatancy’ by Kettermann et al., 2019. It contains cross-plots and histograms of measured tilted block dimensions derived from field data in Iceland. Cross-Plots Length vs. Throw Length vs. True Width TB Dip vs. Throw TB Offset vs Throw True Width vs TB Dip TB Dip vs. True Aperture Throw vs. True Aperture Length vs. True Aperture True Width vs. True Aperture Fault Dip vs Hinge Depth True Width vs Hinge Depth True Aperture vs. Hinge Depth Apparent vs Corrected Aperture Width/Throw vs Aperture Error Displacement vs Aperture Error Dip vs Aperture Error Length vs Aperture Error Width vs Aperture Error Histograms Fault Dip TB Width True Aperture Depth of Hinge TB Length Fault Throw TB Dip Aperture Error

Fig. 1: Crossplot of TB Dip vs. Fault Throw

Fig. 2: Crossplot of TB Width vs. TB Surface Dip

Fig. 3: Crossplot of TB Dip vs. Corrected Aperture

Fig. 4: Crossplot of TB Offset vs. Fault Throw

Fig. 5: Crossplot of Fault Throw vs. Corrected Aperture

Fig. 6: Crossplot of TB Length vs. Corrected Width

Fig. 7: Crossplot of Fault Dip vs. Hinge Depth

Fig. 8: Crossplot of Corrected TB Width vs. Hinge Depth

Fig. 9: Crossplot of TB Length vs. Fault Throw

Fig. 10: Crossplot of Apparent vs. Corrected Aperture

Fig. 11: Crossplot of TB Length vs. Corrected Aperture

Fig. 12: Crossplot of Corrected TB Width vs. Corrected Aperture

Fig. 13: Crossplot of Width/Throw vs. Error in Aperture

Fig. 14: Crossplot of Fault Throw vs. Aperture Error

Fig. 15: Crossplot of TB Dip vs. Aperture Error

Fig. 16: Crossplot of TB Length vs. Aperture Error

Fig. 17: Crossplot of TB Width vs. Aperture Error

Fig. 18: Crossplot of Hinge Depth vs. Corrected Aperture

Fault dip [°] Fig. 19: Histogram of calculated fault dips

TB Width [m] Fig. 20: Histogram of TB widths

True aperture [m] Fig. 21: Histogram of corrected aperture

Depth of hinge [m] Fig. 22: Histogram of hinge depths

TB length [m] Fig. 23: Histogram of TB lengths

Fault throw [m] Fig. 24: Histogram of fault throws

TB dip [°] Fig. 25: Histogram of TB surface dips

Aperture error [m] Fig. 26: Histogram of aperture errors