Figure F3. Hysteresis ratios plotted on a Day-type diagram (Day et al., 1977) for basement samples from Leg 183 drill sites. Js = saturation magnetization, Jr = saturation remanent magnetization, Hc = coercivity, Hcr = remanent coercive force. The plot is usually divided into regions: single domain (SD) for Js/Jr > 0.5 and Hcr/Hc < 1.5, multidomain (MD) for Js/Jr < 0.05 and Hcr/Hc > 4, and pseudo single-domain (PSD) in between.

Figure F3. Hysteresis ratios plotted on a Day-type diagram (Day et al., 1977) for basement samples from Leg 183 drill sites. J_s = saturation magnetization, J_r = saturation remanent magnetization, H_c = coercivity, H_cr = remanent coercive force. The plot is usually divided into regions: single domain (SD) for J_s/J_r > 0.5 and H_cr/H_c < 1.5, multidomain (MD) for J_s/J_r < 0.05 and H_cr/H_c > 4, and pseudo single-domain (PSD) in between.