Lithologic Log for Otay Trolley (18S/2W-22E3-7)
| Depth (ft) from |
Depth (ft) to |
Lithology | Description |
|---|---|---|---|
| 0 | 65 | gS | Gravelly sand (M-VC, pebbles <30mm dia.) |
| 65 | 100 | sM | Slightly sandy silty clay (F-C) |
| 100 | 125 | zS | Silty sand (F-C) |
| 125 | 140 | msG | Gravel, sand, silt, clay |
| 140 | 180 | zS | Silty sand (M-VC) |
| 180 | 270 | sG | Gravelly sand (C-VC, pebbles <10 mm dia.) |
| 270 | 310 | M | Clayey silt |
| 310 | 320 | sG | Sandy gravel |
| 320 | 400 | S | Sand (M-VC) |
| 400 | 430 | sG | Sandy gravel |
| 430 | 450 | M | Clayey silt |
| 450 | 480 | M | Clayey silt (shell frags) |
| 480 | 520 | M | Clayey silt |
| 520 | 560 | zS | Silty sand |
| 560 | 700 | M | Clayey silt |
| 700 | 900 | C | Clay |
| 900 | 930 | zS | Silty sand (VF-F) |
| 930 | 1000 | C | Clay |
| 1000 | 1100 | M | Clayey silt |
| 1100 | 1160 | C | Clay |
| 1160 | 1480 | M | Silt/Clay |
| 1480 | 1500 | sM | Sandy silt/clay (C) |
| 1500 | 1540 | M | Silt/Clay |
| 1540 | 1600 | sM | Sandy silt/clay |
Questions about San Diego Hydrogeology? Please contact Wes Danskin (email: wdanskin@usgs.gov or send a letter). 619.225.6132
