Table T12. Depths and ages of magnetic chrons and subchrons identified, Site 1177.
| Depth (mbsf) | Polarity | Boundary of chron |
Subchron | Age (Ma) |
|
|---|---|---|---|---|---|
|
Top
|
Bottom
|
||||
| 301.85 | 302.20 | N | Reunion | 2.14 | |
| 328.55 | 368.15 | N | Matuyama/Gauss | C2An.1n | 2.581 |
| 368.15 | 375.15 | R | Mammoth | 3.22 | |
| 375.15 | 384.25 | N | C2An.3n | 3.33 | |
| 384.25 | 397.25 | R | Gauss/Gilbert | C2Ar | 3.58 |
| 397.25 | 399.45 | N | Cochiti | 4.18 | |
| 399.45 | 401.75 | R | C3n.1r | 4.29 | |
| 401.75 | 405.35 | N | Nunivak | 4.48 | |
| 405.35 | 409.23 | R | C3n.2r | 4.62 | |
| 409.23 | 417.95 | N | Sidufijall | 4.8 | |
| 417.95 | 427.45 | R | C3r | 5.23 | |
| 427.45 | 431.80 | N | Gilbert/C3A | C3An.1n | 5.894 |
| 431.80 | 433.12 | R | C3An.1r | 6.137 | |
| 433.12 | 439.00 | N | C3An.2n | 6.269 | |
| 439.00 | 450.00 | R | C3Ar | 6.567 | |
| 444.25 | 450.00 | N | C3A/C3B | C3B.1n | 6.935 |
| 534.55 | 535.40 | N | C4A/C5 | C5n.1n | 9.74 |
| 755.10 | 759.35 | N | C5Cn.1n? | 16.014 | |
| 761.10 | 791.95 | N | C5Cn.2n? | 16.327 | |
Notes: N = normal, R = reversed. ? = uncertain chron identification.