Table T5. Volcanic ash layers recovered at Site 1143.
| Hole 1143A | Hole 1143B | Hole 1143C | Thickness (cm) | Description | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Core, section, interval (cm) | Top | Core, section, interval (cm) | Top | Core, section, interval (cm) | Top | |||||||
| (mbsf) | (mcd) | (mbsf) | (mcd) | (mbsf) | (mcd) | |||||||
| 2H-2, 73 | 5.13 | 5.55 | NO | NO | 1-2 | Light gray, intensely bioturbated volcanic ash | ||||||
| 5H-6, 121-123 | 40.11 | 42.65 | 5H-4, 4-6 | 38.44 | 42.68 | NO | 1-2 | Light gray, intensely bioturbated volcanic ash | ||||
| NO | NO | 6H-6, 24-24 | 52.14 | 57.60 | 0-1 | Discontinuous ash (filled burrow?) | ||||||
| 8H-CC, 2-4 | 69.67 | 73.37 | 8H-4, 17-25 | 67.07 | 72.89 | 8H-2, 121-125 | 66.11 | 72.95 | 2-8 | Dark gray, bioturbated volcanic ash | ||
| 9H-3, 114-118 | 73.54 | 77.64 | 8H-7, 41 to 8H-CC, 3 | 71.81 | 77.63 | 8H-5, 148, to 8H-6, 3 | 70.88 | 77.72 | 4-9 | Dark gray ash, sharp basal contact | ||
| NO | NO | 8H-6, 138-139 | 72.28 | 79.12 | 0-1 | Dark gray, thin, discontinuous, intensely bioturbated ash | ||||||
| NO | NO | 9H-6, 132 | 81.72 | 89.10 | 0-1 | Dark gray, discontinuous ash | ||||||
| 10H-2, 104 | 81.44 | 86.08 | NO | NO | 0-1 | Foraminifer sand with tephra particles | ||||||
| 20H-4, 94-97 | 179.34 | 187.19 | 20X-2, 134-138 | 178.24 | 187.11 | 19H-7, 11-22 | 176.61 | 186.90 | 3-11 | Dark gray, graded, sharp basal contact | ||
| NO | 25X-2, 68-75 | 221.68 | 232.88 | NO | >1 | Dark gray, foraminifer tests, and angular quartz | ||||||
| NO | NO | 25X-4, 104-105 | 224.04 | 236.44 | >1 | Dark gray, foraminifer tests, and angular quartz | ||||||
| NO | 31X-6, 15 | 284.05 | 296.45 | 0-1 | Black discontinuous ash | |||||||
| 45X-7, 30, to 45X-CC, 9 | 420.00 | 432.40 | 14 | Dark gray, graded clay with quartz | ||||||||
| 47X-5, 33-37 | 436.23 | 448.63 | 4 | Breccia | ||||||||
| 47X-6, 98-101 | 438.38 | 450.78 | 3 | Breccia | ||||||||
| 49X-CC, 7-27 | 457.84 | 470.24 | >20 | Dark gray | ||||||||
| 53X-3, 10-17 | 491.00 | 503.40 | 7 | Black | ||||||||
Note: NO = not observed.