Table 15. Ages for reversals in the Gilbert, estimated for Site 852. Event, Hole 852B, Hole 852C, Hole 852D, Mean, Event C3n.1n(t) 4.197 4.194 4.194 4.1992a Cochiti (t) C3n.1n(o) 4.307 N.D. 4.316 4.316a Cochiti (o) C3n.2n(t) N.D. 4.480 4.478 4.479 Nunivak (t) C3n.2n(o) 4.621 4.618 4.631 4.623 Nunivak (o) C3n.3n(t) 4.780 4.785 4.777 4.781 Sidufjall (t) C3n.3n(o) 4.882 4.875 4.877 4.878 Sidufjall (o) C3n.4n(t) 4.980 4.975 4.977 4.977 Thvera (t) C3n.4n(o) 5.240 5.224 5.231 5.232 Thvera (o) C3A.1n(t) 5.870 5.892 5.885 5.882 Epoch 5 (t) C3A.1n(o) 6.106 6.110 N.D. 6.108 C3A.2n(t) 6.275 6.277 6.283 6.278 a at C3n.1n(o) and (t), the mean is based on Sites 851 and 852. (t) = termination and (o) = onset.