|
Site,
hole |
Seismic
horizon |
Estimated depth
prior to Leg 204 (mbsf) |
Confirmed or
revised depth (mbsf) |
Basis for
revision |
|---|---|---|---|---|
| 204- |
|
|
|
|
| 1244 | BSR | 124 | 127-129 | VSP, WSL |
|
|
B | 162 | 160 | VSP |
|
|
B' | 205 | 216-218 | LWD, VSP |
| 1245 | Y | 73 |
|
|
|
|
BSR | 134 |
|
|
|
|
A | 180 |
|
|
| 1246 | B | 59 |
|
|
|
|
B' | 97 | 96 | LWD |
|
|
BSR | 114 |
|
|
| 1247A | Y | 60 |
|
|
|
|
BSR | 121 |
|
|
|
|
A | 162 | 162-165 | LWD |
| 1247B | Y | 62 | 65 | VSP |
|
|
BSR | 124 | 129-134 | LVD, VSP, WSL |
|
|
A | 158 | 150-160 | VSP |
| 1248 | Y | 46 |
|
|
|
|
BSR | 115 |
|
|
|
|
A | 128 | 127-129 | LWD |
| 1249 | Y | 53 |
|
|
|
|
BSR | 115 |
|
|
| 1250 | Y | 42 |
|
|
|
|
BSR | 112 | 114 | LWD, VSP, WSL |
|
|
A | 150 | 148-152 | LWD, VSP, WSL |
| 1251 | U | 130 |
|
|
|
|
BSR | 193 |
|
|
| 1252 | U | 95 |
|
|
|
|
BSR | (170) |
|
|
Notes: VSP = vertical seismic profile, LWD = electrical resistivity from logging while drilling, WSL = wireline sonic log. The depth to major seismic horizons is estimated from 3-D seismic reflection data (Tréhu and Bangs, 2001; Tréhu et al., 2002) using velocities from 3-D OBS tomography (Arsenault et al., 2001). Updates of these estimates based on data acquired during Leg 204 are given when available from shipboard results. The bottom-simulating reflector (BSR) depth at Site 1252 is projected from nearby BSR observations.