Figure F2. Examples of alternating-field demagnetization followed by progressive thermal demagnetization for selected samples. For each sample, the following are shown: an orthogonal vector plot with solid (open) symbols for data projected onto the horizontal (vertical) plane, a normalized plot of the intensity of magnetization vs. demagnetization step, and a stereographic projection. A. Section 207-1258B-8R-3, 33 cm (early Eocene; 72.96 mbsf) = N-type behavior, assigned as N, may represent brief normal zone within Chron C22r. B. Section 207-1258A-22R-3, 9 cm (late Paleocene; 223.62 mbsf) = N-type (150°C step is an artifact—see text), assigned as NP, within Chron C25n. C. Section 207-1260B-13R-1, 14 cm (early Eocene; 238.09 mbsf) = N-type behavior, assigned as N, within Chron C24n. D. Section 207-1261A-25R-1, 51 cm (middle Eocene; 410.81 mbsf) = N-type, assigned as N, within Chron C20n. E. Section 207-1259A-26R-1, 13 cm (middle Eocene; 237.04 mbsf) = hook-type, assigned as R, within Chron C20r. F. Section 207-1260A-25R-7, 32 cm (early Eocene; 227.71 mbsf) = hook-type, assigned as R, within Chron C23r. G. Section 207-1261A-23R-3, 37 cm (middle Eocene; 394.47 mbsf) = hook-type, assigned as R, within Chron C19r. H. Section 207-1257B-4R-4, 84 cm (early Eocene; 71.84 mbsf) = quasi-hook-type (declination shifts by 50°), assigned as RP, within Chron C23r. I. Section 2071258A-28R-5, 67 cm (late Maastrichtian; 284.02 mbsf) = hook-type, but no endpoint reached, therefore assigned as RPP, within Chron C29r. J. Section 207-1259A-44R-3, 94 cm (late Paleocene; 415.51 mbsf) = hook-type, assigned as RP, within Chron C25r.

Figure F2. Examples of alternating-field demagnetization followed by progressive thermal demagnetization for selected samples. For each sample, the following are shown: an orthogonal vector plot with solid (open) symbols for data projected onto the horizontal (vertical) plane, a normalized plot of the intensity of magnetization vs. demagnetization step, and a stereographic projection. A. Section 207-1258B-8R-3, 33 cm (early Eocene; 72.96 mbsf) = N-type behavior, assigned as N, may represent brief normal zone within Chron C22r. B. Section 207-1258A-22R-3, 9 cm (late Paleocene; 223.62 mbsf) = N-type (150°C step is an artifact—see text), assigned as NP, within Chron C25n. C. Section 207-1260B-13R-1, 14 cm (early Eocene; 238.09 mbsf) = N-type behavior, assigned as N, within Chron C24n. D. Section 207-1261A-25R-1, 51 cm (middle Eocene; 410.81 mbsf) = N-type, assigned as N, within Chron C20n. E. Section 207-1259A-26R-1, 13 cm (middle Eocene; 237.04 mbsf) = hook-type, assigned as R, within Chron C20r. F. Section 207-1260A-25R-7, 32 cm (early Eocene; 227.71 mbsf) = hook-type, assigned as R, within Chron C23r. G. Section 207-1261A-23R-3, 37 cm (middle Eocene; 394.47 mbsf) = hook-type, assigned as R, within Chron C19r. H. Section 207-1257B-4R-4, 84 cm (early Eocene; 71.84 mbsf) = quasi-hook-type (declination shifts by 50°), assigned as RP, within Chron C23r. I. Section 2071258A-28R-5, 67 cm (late Maastrichtian; 284.02 mbsf) = hook-type, but no endpoint reached, therefore assigned as RPP, within Chron C29r. J. Section 207-1259A-44R-3, 94 cm (late Paleocene; 415.51 mbsf) = hook-type, assigned as RP, within Chron C25r.