Table T14. Depths and ages of magnetic chrons and subchrons, Site 1173.
| Depth (mbsf) |
Polarity | Chron boundary |
Subchron | Age (Ma) |
|
|---|---|---|---|---|---|
|
Top
|
Bottom
|
||||
| 54.74 | 54.89 | R | C1n-1? | ||
| 159.69 | 160.34 | R | Brunhes/Matuyama | 0.78 | |
| 160.34 | 160.59 | N | Kamikatura? | ||
| 179.34 | 193.14 | N | Jaramillo | 0.99 | |
| 193.14 | 197.74 | R | C1r.2r | 1.07 | |
| 197.74 | 201.69 | N | Cobb Mountain? | ||
| 240.64 | 242.29 | N | Oldvai | 1.77 | |
| 256.49 | 260.59 | R | C2r.1r | ||
| 260.59 | 261.19 | N | Reunion? | ||
| 261.19 | 287.49 | R | C2r.2r | 1.95 | |
| 291.69 | 333.39 | N | Matuyama/Gauss | C2An.1n | 2.581 |
| 333.39 | 338.44 | R | Kaena | 3.04 | |
| 338.44 | 350.59 | N | C2An.1r | 3.11 | |
| 350.59 | 361.59 | R | Mammoth? | ||
| 374.39 | 374.74 | R | Gauss/Gilbert | C2Ar | 3.58 |
| 381.99 | 389.19 | N | Cochiti? | ||
| 393.39 | 398.04 | N | Nunivak? | ||
| 400.94 | 404.04 | N | Sidufjall? | ||
| 406.94 | 412.74 | N | Thvera? | ||
| 423.84 | 430.24 | N | Gilbert/C3A | C3An.1n | 5.894 |
| 433.54 | 439.44 | N | C3An.2n | 6.269 | |
| 439.44 | 445.69 | R | C3Ar | 6.567 | |
| 445.69 | 447.14 | N | C3A/C3B | C3Bn? | |
| 451.54 | 452.49 | N | C3B/C4 | C4n.1n | |
| 452.89 | 455.19 | N | C4n.2n | ||
| 478.94 | 491.49 | R | C4r.1r | 8.257 | |
| 491.49 | 500.34 | N | C4/C4A | C4An | 8.699 |
| 500.34 | 501.39 | R | C4Ar.1r | 9.025 | |
| 501.39 | 512.34 | N | C4A/C5 | C5n.1n | 9.74 |
| 513.04 | 557.79 | N | C5n.2n | ||
| 557.79 | 559.39 | R | C5r.1r | 10.949 | |
| 578.49 | 580.99 | N | C5/C5A | C5An.1n | 11.935 |
| 581.49 | 586.74 | N | C5An.2n | ||
| 589.90 | 590.25 | R | C5Ar.1r | 12.401 | |
| 635.89 | 645.99 | N | C5AB/C5AC | C5ACn | 13.703 |
| 652.54 | 653.34 | R | C5ACr | 14.076 | |
| 653.34 | 654.44 | N | C5AC/C5AD | C5ADn | 14.178 |
| 662.69 | 662.99 | R | C5ADr | 14.612 | |
Notes: N = normal, R = reversed. ? = uncertain chron and subchron identification.