Table T1. Geomagnetic polarity boundaries. (See table note.)
| Polarity chron boundary | Age (Ma) |
Depth (mcd) |
|---|---|---|
| C1n bottom: Brunhes/Matuyama | 0.78 | 16.91 |
| C1r.1n top: Jaramillo top | 0.99 | 21.06 |
| C1r.1n bottom: Jaramillo bottom | 1.07 | 23.06 |
| C2n top: Olduvai top | 1.77 | 46.13 (?) |
| C2n bottom: Olduvai bottom | 1.95 | 46.86 (?) |