Table T11. Depths and ages of magnetic chrons and subchrons, Holes 1178A and 1178B.

Depth
(mbsf)
Polarity
Chron
Subchron
Age
(Ma)
0.05 N Brunhes

8.5 N Gauss

43.65 R
C2An.2r 3.22
53.65 N
C2An.2n 3.33
89.05 R Gilbert
3.58
323.3 N C3A
5.894
353.5 N C3B?
6.935
405.42 N C4 C4r.1n 8.225
408.94 R
END of C4r.1n 8.257

Note: N = normal, R = reversed.