“…Three normal (N1, N2 and N3) and three reversed (R1, R2 and R3) polarity zones were recognized, as at other Chinese loess sections (Heller and Liu, 1982;Liu, 1985;Kukla and An, 1989;Rutter et al, 1991;Zheng et al, 1992;Ding et al, 2002). By comparison with the GPTS (Valet and Meynadier, 1993;Cande and Kent, 1995;Channell et al, 2002), N1 corresponds to the Brunhes chron, and the B/M boundary (0.78 Ma) is situated within horizons S7 to L8. N2 corresponds to the Jaramillo subchron (0.99e1.07 Ma), and lies between horizons S10 and S12.…”