Lithologic Log for Aqua Culture (16S/2W-18J3-7)
Shaker
[Altitude of land surface, approximately 80 feet NAVD29. Depth is in feet below land surface. Drilled by U.S. Geological Survey using hydraulic rotary, November 22, 2004. Total depth drilled 949.5 feet. Screened intervals: 920-940, 880-900, 840-860, 710-730, 465-485, 145-165, and 30-50 feet.]
| Depth (ft) | Description |
|---|---|
| 10 | Sand (S); very fine to medium sand; well sorted; subrounded; dark grayish brown (2.5Y 4/2) |
| 20 | Gravelly silty sand (gmS); fine to coarse sand with very fine sand and silt and very coarse sand to pebbles <10 mm diameter; very poorly sorted; subrounded; dark grayish brown (10YR 4/2) |
| 30 | Silty gravelly sand (gmS); fine to very coarse sand with granules and pebbles <10 mm diameter and very fine sand and silt; very poorly sorted; subrounded; greenish gray (5GY 5/1) and dark grayish brown (10YR 4/2) |
| 40 | Silty sand (zS); medium to very fine sand with silt and very coarse sand; poorly sorted; subrounded; dark grayish brown (10YR 4/2) |
| 50 | Gravelly silty sand (gmS); fine to very coarse sand with very fine sand and silt and some granules; very poorly sorted; subrounded; greenish gray (5GY 5/1), dark grayish brown (10YR 4/2) |
| 60 | Sand (S); coarse to very coarse sand; very well sorted; subrounded; grayish brown (2.5Y 5/2) |
| 70 | Sand (S); very fine to medium sand; well sorted; subrounded; gray (2.5Y 5/1) |
| 80 | Silty sand (zS); very fine to medium sand with silt; well sorted; subrounded; gray (2.5Y 5/1) |
| 90 | Silty sand (zS); very fine to medium sand with silt and some coarse to very coarse sand; moderately sorted; subrounded; gray (2.5Y 5/1) |
| 100 | Sandy silt (sZ); silt and very fine sand with occasional coarse to very coarse sand; well sorted; subrounded; dark gray (N 4/1) |
| 110 | Sandy silt (sZ); silt and very fine sand; very well sorted; subrounded; gray (N 5/1) |
| 120 | Sandy silt (sZ); silt and very fine sand with medium to very coarse sand; moderately sorted; subrounded; dark gray (N 4/1) |
| 130 | Sandy silty gravel (mG); pebbles <10 mm diameter with silt and very fine sand; very poorly sorted; subrounded; gray (2.5Y 5/1) |
| 140 | Silty sand (zS); fine to very fine sand and silt; well sorted; subrounded; dark gray (N 4/1) |
| 150 | Sandy silt (sZ); silt and very fine sand; very well sorted; subrounded; dark gray (N 4/1) |
| 160 | Sand (S); coarse to very coarse sand; very well sorted; subrounded; grayish brown (2.5Y 5/2) |
| 168 | Silty gravel (mG); pebbles (fresh fragments) <8 mm diameter with silt; very poorly sorted; angular; gray (N 5/1) |
| 170 | Sandy silt (sZ); silt and very fine sand; very well sorted; subrounded; dark gray (N 4/1) |
| 180 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (N 4/1) |
| 190 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (N 4/1) |
| 200 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (N 4/1) |
| 210 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; gray (2.5Y 6/1) |
| 220 | Clayey silt (M); silt with clay; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 228 | Sand (S); coarse to very coarse sand; very well sorted; subrounded; light olive brown (2.5Y 5/3) |
| 250 | Sandy silt (sZ); silt and very fine sand; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 260 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 270 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 280 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 290 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 300 | Sandy silt (sZ); silt and very fine sand; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 310 | Sandy silt (sZ); silt and very fine sand; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 320 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 330 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 340 | Sandy silt (sZ); silt and very fine sand; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 350 | Sandy silt (sZ); silt and very fine sand; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 360 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 370 | Sand (S); very fine sand; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 380 | Slightly gravelly silty sand ((g)mS); very fine sand with silt and occasional pebbles <6 mm diameter; well sorted; subrounded to subangular; dark gray (2.5Y 4/1) |
| 390 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 400 | Slightly gravelly silty sand ((g)mS); fine to very fine sand with silt and occasional granules and pebbles <6 mm diameter; moderately sorted; subrounded to subangular; dark gray (2.5Y 4/1) |
| 410 | Sandy silt (sZ); silt and very fine sand; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 420 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 430 | Sand (S); fine to very fine sand; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 440 | Silty sand (zS); fine to very fine sand with silt; well sorted; subrounded; dark gray (2.5Y 4/1) |
| 450 | Sandy silt (sZ); silt and very fine sand; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 460 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 470 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 480 | Silty sand (zS); fine to very fine sand and silt; well sorted; subrounded; dark gray (2.5Y 4/1) |
| 490 | Sand (S); fine to very fine sand; very well sorted; subrounded; gray (2.5Y 5/1) |
| 500 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 510 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 520 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 530 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 540 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 550 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 560 | Sandy silt (sZ); silt and very fine sand; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 570 | Sandy silt (sZ); silt and very fine sand with occasional coarse to very coarse sand; well sorted; subrounded; dark gray (2.5Y 4/1) |
| 580 | Sandy silt (sZ); silt and very fine sand; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 590 | Sandy silt (sZ); silt and very fine sand; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 600 | Silty sand (zS); very fine sand and silt with occasional coarse to very coarse sand; well sorted; subrounded; dark gray (2.5Y 4/1) |
| 610 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 620 | Silty sand (zS); very fine sand and silt with occasional very coarse sand; well sorted; subrounded; dark gray (2.5Y 4/1) |
| 630 | Sandy silt (sZ); silt and very fine sand with occasional coarse to very coarse sand; well sorted; subrounded; dark gray (2.5Y 4/1) |
| 640 | Sandy silt (sZ); silt and very fine sand with occasional coarse to very coarse sand; well sorted; subrounded; dark gray (2.5Y 4/1) |
| 650 | Silty sand (zS); very fine sand and silt; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 660 | Sandy silt (sZ); silt and very fine sand; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 670 | Sandy silt (sZ); silt and very fine sand; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 680 | Silty sand (zS); very fine sand and silt with occasional coarse to very coarse sand; well sorted; subrounded; dark gray (2.5Y 4/1) |
| 690 | Silty sand (zS); very fine sand and silt with coarse to very coarse sand; moderately sorted; subrounded; dark gray (2.5Y 4/1) |
| 700 | Silty sand (zS); very fine sand and silt with coarse to very coarse sand; moderately sorted; subrounded; dark gray (2.5Y 4/1) |
| 710 | Sandy silt (sZ); silt and very fine sand; very well sorted; subrounded; dark gray (2.5Y 4/1) |
| 720 | Sand (S); medium to very fine sand with some coarse to very coarse sand; moderately sorted; subrounded; dark gray (2.5Y 4/1) |
| 730 | Silty sand (zS); very fine sand and silt with some coarse to very coarse sand; moderately sorted; subrounded; gray (2.5Y 5/1) |
| 740 | Clayey sandy silt (sM); silt and very fine sand with some clay; well sorted; subrounded; olive gray (5Y 5/2) and dark gray (5Y 4/1) |
| 750 | Clayey sandy silt (sM); silt and very fine sand with some clay; well sorted; subrounded; light olive brown (2.5Y 5/3), brown (10YR 5/3), and greenish gray (5GY 6/1) |
| 760 | Clayey sandy silt (sM); silt and very fine sand with some clay; well sorted; subrounded; light olive brown (2.5Y 5/4), greenish gray (5GY 6/1), and dark reddish brown (2.5YR 3/3) |
| 770 | Clayey sandy silt (sM); silt and very fine sand with some clay; well sorted; subrounded; light olive brown (2.5Y 5/3), light gray (5Y 7/1), and dark gray (2.5Y 4/1) |
| 780 | Gravelly clayey silty sand (gmS); fine sand to silt with some clay and coarse sand to granules; very poorly sorted; subrounded; light olive brown (2.5Y 5/3), dark gray (2.5Y 4/1), greenish gray (5G 6/1) |
| 790 | Clayey sandy silt (sM); silt and very fine sand with some clay and occasional very coarse sand; moderately sorted; subrounded; light olive brown (2.5Y 5/3), gray (2.5Y 5/1), dark reddish brown (2.5YR 3/3) |
| 800 | Clayey sandy silt (sM); silt and very fine sand with some clay and coarse to very coarse sand; poorly sorted; subrounded; light olive brown (2.5Y 5/4), dark gray (2.5Y 4/1) |
| 810 | Clayey sandy silt (sM); silt and very fine sand with some clay and occasional very coarse sand; moderately sorted; subrounded; light olive brown (2.5Y 5/4), dark gray (2.5Y 4/1), dark reddish brown (2.5YR 3/3) |
| 820 | Clayey sandy silt (sM); silt and very fine sand with some clay and coarse to very coarse sand; poorly sorted; subrounded; olive gray (5Y 5/2), dark gray (2.5Y 4/1) |
| 830 | Clayey sandy silt (sM); silt and very fine sand with some clay and coarse to very coarse sand; poorly sorted; subrounded; dark gray (2.5Y 4/1), gray (2.5Y 5/1) |
| 840 | Sandy clayey silt (sM); silt and clay with very fine sand and some coarse to very coarse sand; moderately sorted; subrounded; dark gray (2.5Y 4/1), gray (2.5Y 5/1), light olive brown (2.5Y 5/3) |
| 850 | Silty sand (zS); very fine sand and silt with some coarse to very coarse sand; moderately sorted; subrounded; dark gray (2.5Y 4/1), gray (2.5Y 5/1), light olive brown (2.5Y 5/3) |
| 860 | Silty sand (zS); very fine sand and silt with some coarse to very coarse sand; moderately sorted; subrounded; greenish gray (10Y 5/1), dark gray (2.5Y 4/1) |
| 870 | Silty sand (zS); very fine sand and silt with some coarse to very coarse sand; moderately sorted; subrounded; greenish gray (10Y 5/1), dark gray (2.5Y 4/1) |
| 880 | Silty sand (zS); very fine sand and silt with some coarse to very coarse sand; moderately sorted; subrounded; greenish gray (10Y 5/1), dark gray (2.5Y 4/1) |
| 890 | Silty sand (zS); coarse to very coarse sand with very fine sand and silt; moderately sorted; subangular; very dark gray (N 3/1); volcanic fragment |
| 900 | Silty sand (zS); coarse to very coarse sand with very fine sand and silt; moderately sorted; subangular; very dark gray (N 3/1); volcanic fragment |
| 910 | Sand (S); coarse to very coarse sand with very fine to fine sand; moderately sorted; subangular; dark gray (N 4/1); volcanic fragments |
| 920 | Silty sand (zS); coarse to very coarse sand with very fine sand and silt; moderately sorted; subangular; greenish gray (10Y 5/1); some volcanic fragments |
| 930 | Silty sand (zS); very fine sand and silt with coarse to very coarse sand; moderately sorted; subangular to subrounded; greenish gray (10Y 5/1); volcanic fragments |
| 940 | Clayey silty sand (mS); very fine sand and silt with coarse to very coarse sand and some clay; poorly sorted; subangular; greenish gray (10Y 5/1), greenish gray (5G 6/1); volcanic fragments |
| 945 | Washed sample — Gravelly sand (gS); coarse to very coarse sand with granules and some medium to fine sand; poorly sorted; subangular |
| 946-947.5 | Core — Fractured hard rock — San Diego Peak Volcanics? |
Questions about San Diego Hydrogeology? Please contact Wes Danskin (email: wdanskin@usgs.gov or send a letter). 619.225.6132
