Figure F2. Example demagnetization results from Hole 1213B basalt samples. Plots show projection of magnetization vector endpoints on two orthogonal planes: horizontal (solid squares) and vertical (open squares). Numbers give strength of demagnetizing field (in milliTesla) or temperature of sample heating (in degrees centigrade). A. Alternating-field (AF) demagnetized sample from which the downward directed overprint is never completely removed. B. AF demagnetized sample that gives a shallow, negative characteristic magnetization. C. Thermally demagnetized sample for which heating did not completely remove the downward overprint. D. Thermally demagnetized sample which gives a shallow, negative inclination above 450°C. Inset plots show normalized magnetization and demonstrate large initial loss of magnetization at low AF demagnetization steps.

Figure F2. Example demagnetization results from Hole 1213B basalt samples. Plots show projection of magnetization vector endpoints on two orthogonal planes: horizontal (solid squares) and vertical (open squares). Numbers give strength of demagnetizing field (in milliTesla) or temperature of sample heating (in degrees centigrade). A. Alternating-field (AF) demagnetized sample from which the downward directed overprint is never completely removed. B. AF demagnetized sample that gives a shallow, negative characteristic magnetization. C. Thermally demagnetized sample for which heating did not completely remove the downward overprint. D. Thermally demagnetized sample which gives a shallow, negative inclination above 450°C. Inset plots show normalized magnetization and demonstrate large initial loss of magnetization at low AF demagnetization steps.