Fig. 9
Representative demagnetization curves (tilt corrected) and related intensity plots. Blue and green points represent the vertical and horizontal projections of the magnetic direction (after Zijderveld 1967). Full circles indicate thermally demagnetized steps, empty circles denote AF demagnetization. a Pure thermal demagnetization curve of sample P03Â g resulting in normal ChRM. b Mixed AF and thermal demagnetization curve of sample P02b showing reverse ChRM. c Mixed demagnetization showing normal ChRM of sample P05d