Table 1 Stratigraphic positions for the polarity reversal horizons
Polarity boundary | Transitional zone | Mid-thickness (m) | Age (Ma) | |
|---|---|---|---|---|
Top (m) | Bottom (m) | |||
Mammoth top | 309.7 | 305.95 | 307.83 | 3.207 |
Mammoth bottom | 298 | 294.1 | 296.05 | 3.330 |
Gilbert–Gauss | 223.7 | 222.45 | 223.08 | 3.596 |
Cochiti top | 70.1 | 64.2 | 67.15 | 4.187 |
Cochiti bottom | 55.4 | 50.75 | 53.08 | 4.300 |
Nunivak top | 10.1 | 9.9 | 10 | 4.493 |