Figure 4: Changes of magnetization directions on Zijderveld diagram and Wulf stereonet during alternative field (AF) demagnetization method and demagnetization curve for typical samples (See Supplementary Figures (Table S2) for all other samples); a) normal polarity from Brunhes section (12_0P, 13_0P) and b) reversed polarity from Matuyama section (08_0M, 21_5M).