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Open-File Report 2004–1434
By Beth M. Wrege and Philip S. Jen
Strat-1
Figure 4. Map showing location of Strat-1 well
Table 3. Lithologic log for Strat-1 test hole
Figure 5. Selected borehole geophysical logs collected in Strat-1 test hole
Figure 6. Strat-1 monitoring-well construction report
Table 4. Periodic water levels in Strat-1 monitoring well
Figure 4. Location of Strat-1 well at U.S. Marine Corps Air Station, Cherry Point, North Carolina.
| Depth below land surface (in feet) | Description (compiled by B.M. Wrege) |
|---|---|
| 0.0 – 3.0 | SOIL. |
| 3.0 – 4.0 | Silty CLAY. |
| 4.0 – 5.0 | Silty, sandy CLAY. |
| 5.0 – 6.0 | Fine SAND. |
| 6.0 – 8.0 | No sample. |
| 8.0 – 10.0 | SAND. |
| 10.0 – 12.0 | Gray silty CLAY. |
| 12.0 – 14.0 | Gray SAND, some silt. |
| 14.0 – 15.0 | Well-sorted fine SAND–light gray. |
| 15.0 – 18.0 | Fine–medium SAND, clay ball. |
| 18.0 – 20.0 | Fine silty, clayey SAND–light gray. |
| 20.0 – 22.0 | CLAY stringers, coarse sand. |
| 22.0 – 24.0 | Silty CLAY, coarse sand stringer. |
| 24.0 – 26.0 | Medium-coarse SAND. |
| 26.0 – 28.0 | Medium SAND, gray, well sorted, some silt. |
| 28.0 – 30.0 | Fine–medium SAND, gray, well sorted, some silt. |
| 30.0 – 32.0 | SAND, moderately indurated with silt and clay, light gray. |
| 32.0 – 34.0 | SAND, gray clay and shell hash. |
| 34.0 – 36.0 | Green-gray CLAY and shell fragments. |
| 36.0 – 38.0 | Green-gray CLAY and shell fragments. |
| 38.0 – 40.0 | Green-gray CLAY. |
| 40.0 – 42.0 | Green CLAY–abundant shell hash. |
| 42.0 – 44.0 | Bluish-gray SAND, medium to fine sand, phosphate grains, fine shell fragments, minor clay. |
| 44.0 – 46.0 | Fine SAND, shell bits, modest clay, bluish gray. |
| 46.0 – 48.0 | Fine SAND, fine shell bits, bluish gray. |
| 48.0 – 50.0 | Fine SAND, bluish gray. |
| 50.0 – 52.0 | Green silty CLAY, hard, some fine sand, fine shell fragments. |
| 52.0. – 54.0 | Dense green silty CLAY, some fine sand, a few shell fragments. |
| 54.0 – 56.0 | Dense green silty CLAY, few quartz grains. |
| 56.0 – 58.0 | Green silty CLAY, hard, some fine sand, fine shell fragments. |
| 58.0 – 59.5 | Green silty CLAY with a few coarse quartz pebbles, 3–6 mm, color changes to gray. |
| 59.5 – 60.9 | No sample, hard at bottom of interval, bit sizes, changed from drag bit to roller cone bit. |
| 60.9 – 61.7 | No sample, very hard. |
| 61.7 – 62.0 | No sample, soft, drills easy. |
| 62.0 – 63.3 | Dense green silty sandy CLAY. |
| 63.3 – 64.0 | SAND, clean fine gray. |
| 64.0 – 66.0 | No sample. |
| 66.0 – 67.0 | Fine (sugar) SAND, clean, well sorted, no fossils. |
| 67.0 – 70.0 | No sample. |
| 70.0 – 71.5 | Fine SAND, clean, well sorted. |
| 71.5 – 74.0 | No sample. |
| 74.0 – 75.5 | Fine SAND, clean, well sorted. |
| 75.5 – 78.0 | No sample. |
| 78.0 – 80.0 | Fine SAND, greenish-gray color. |
| 80.0 – 82.0 | No sample. |
| 82.0 – 83.4 | Very fine greenish-gray SAND. |
| 83.4 – 86.0 | No sample. |
| 86.0 – 86.8 | Very fine gray SAND, a few shell fragments. |
| 86.8 – 90.0 | No sample. |
| 90.0 – 91.2 | Medium to coarse SAND, phosphate grains. |
| 91.2 – 94.0 | No sample. |
| 94.0 – 95.0 | Medium to coarse SAND, large phosphate and quartz pebbles, 4–8 mm in diameter, abundant shell fragments. |
| 95.0 – 96.0 | Lime-cemented medium to medium-coarse SAND. |
| 96.0 – 98.0 | No sample. |
| 98.0 – 99.2 | Fine SAND with a few shell fragments. |
| 99.2 – 102.0 | No sample. |
| 102.0 – 104.0 | Fine to medium limey SAND, with a few shell fragments, phosphate grains. |
| 104.0 – 106.0 | No sample. |
| 106.0 – 106.8 | SAND to coarse SAND, with limey phosphate grains. |
| 106.8 – 119.6 | No sample. |
| 119.6 – 120.5 | Fine silty SAND, gray shell fragments. |
| 120.5 – 135.0 | No sample. |
| 135.0 – 140.0 | Shell hash, about 50 percent of cuttings. |
| 140.0 – 150.0 | No sample. |
| 150.0 – 163.0 | Abundant shell fragments with limey brown clay, trace of limestone. |
Figure 5. Selected borehole geophysical logs collected in Strat-1 test hole, U.S. Marine Corps
Air Station, Cherry Point, North Carolina.
Figure 6. Strat-1 monitoring-well construction report, U.S. Marine Corps Air Station, Cherry Point, North Carolina.
| Date | Water Level, feet below land surface |
|---|---|
| 9/21/2000 | 14.53 |
| 2/9/2001 | 14.65 |
| 5/3/2001 | 15.55 |
| 8/9/2001 | 13.83 |
| 3/29/2002 | 15.16 |
| 5/15/2002 | 16.05 |
| 8/16/2002 | 16.74 |
Figure 7. Hydrograph of ground-water levels in Strat-1 monitoring well,
U.S. Marine Corps Air Station, Cherry Point, North Carolina, September 2000–
August 2002.
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