Table T8. Curated downhole depths of key horizons in the Site 1137 lava flows.
| Feature | Depth
from logging (mbsf) |
Curated depth (mbsf) |
|---|---|---|
| First intact lava (top of Unit 1) | 227 | 219.51 |
| Contact between Units 1 and 2 | 233.1 | 232.22 |
| Unit 2 breccia becomes coherent | 235-237 | 234.20 |
| Contact between Units 2 and 3 | 243.2 | 247.60 |
| Zone with extensive fracturing | 244.6-246.0 | NM |
| Unit 3 transition from vesicular top to massive interior | 252.8 | 251.42 |
| Base of Unit 3 (flow on Unit 4 silt) | 259.8 | 259.10 |
| Top of lava of Unit 4 (under ~8 cm of silt) | 259.9 | 259.18 |
| Contact between Units 4 and 5 (lava over volcanic sandstone) | 286.5 | 286.72 |
| Contact between Units 5 and 6 (sandstone over conglomerate) | 290.9 | 291.01 |
| Contact between Units 6 and 7 (conglomerate over lava) | 321.9 | 322.80 |
| Unit 7 breccia becomes coherent | 327.7 | 327.73 |
| Contact between Units 7 and 8 (massive lava over basal breccia) | 334.6 | 334.14 |
| Basal breccia over Unit 8 flow top | 335 | NM |
| Unit 8 transition from vesicular flow top to massive interior | 338 | 335.14 |
| Contact between Units 8 and 9 (lava over crystal vitric tuff) | 345.6 | 344.03 |
| Contact between Units 9 and 10 (crystal vitric tuff over lava) | 360.5 | 360.67 |
| Unit 10 breccia becomes coherent | 364 | 363.97 |
| Base of Hole 1137A | 371.2 | 371.20 |
Note: NM = not measured.