Table T12. Characteristic remanent magnetization (ChRM) inclinations fit by principal component analysis of alternating-field demagnetization data.
 
Core, section,
interval (cm)
N
Demagnetization
step
(mT)
MAD
(°)
ChRM
inclination
(°)
k
(x10-6 SI)
Koenigsberger
ratio
196-1173B-




1R-1, 107 5 (+o) 15-30 5.3 -23.1 7195 8.71
1R-1, 141 5 15-35 2.9 -18.7 6545 4.73
1R-2, 61 NA NA NA NA 6300 9.82
2R-1, 34 6* 20-60 11.1 -22.8 5680 9.98
3R-1, 84 7 20-50 3.9 -38.2 5660 7.26
3R-2, 14 6 35-70 29.7 -38.1 4550 6.68

Notes: N = number of demagnetization points used in fit. MAD = median angular deviation of the directional fit. The magnetic susceptibility (k) was volume normalized assuming a 10-cm3 sample. Koenigsberger ratio = NRM/(k x H), where NRM is the intensity of the natural remanent magnetization and H is the strength of Earth's present-day magnetic field at the site (36.5 A/m). +o = origin included in the fit, * = outliers excluded from fit, NA = fit not available.