Data from Stratigraphic Test Holes Drilled at the U.S. Marine Corps Air Station, Cherry Point, North Carolina, 1994–2001, and Periodic Water Levels, 2000–2003

Open-File Report 2004–1434
By Beth M. Wrege and Philip S. Jen

Strat-2

Map showing location of Strat-2 well

Lithologic log for Strat-2 test hole

Selected borehole geophysical logs collected in Strat-2 test hole

Strat-2 monitoring-well construction report

Periodic water levels in Strat-2 monitoring well

Hydrograph showing ground-water levels in Strat-2 monitoring well, September 2000–August 2002

Figure 8. Location of Strat-2 well at U.S. Marine Corps Air Station, Cherry Point, North Carolina.

**Table 5.** Lithologic log for Strat-2 test hole, U.S. Marine Corps Air Station, Cherry Point, North Carolina.

[mm, millimeter; cm, centimeter; ft, feet
Depth below land surface (in feet)	Description (compiled by B.M. Wrege)
0.0 – 1.0	Organic SOIL with clay.
1.0 – 2.0	CLAY with fine sand, yellow.
2.0 – 3.0	Stiff CLAY with medium sand, 20-percent sand.
3.0 – 4.0	CLAY with fine sand, 40-percent sand.
4.0 – 5.0	Dry SAND, fine with clay, well sorted.
5.0 – 7.0	SAND, light brown.
7.0 – 8.0	Clean SAND, grading to more clays.
8.0 – 10.0	SAND, fine with clay, uniform.
10.0 – 12.0	SAND, fine to very fine, uniform.
12.0 – 14.0	SAND, fine, silty.
14.0 – 16.0	SAND, very fine to fine, clean.
16.0 – 18.0	SAND, fine, uniform, clean with trace medium.
18.0 – 20.0	SAND, fine to very fine, uniform, clean.
20.0 – 22.0	SAND, clean, fine, uniform.
22.0 – 23.0	Fine SAND, uniform, clean.
23.0 – 24.0	Clean, well graded, light gray quartz SAND.
24.0 – 26.0	Very fine SAND.
26.0 – 28.0	Very fine SAND.
28.0 – 30.0	Fine SAND, color change at bottom of interval.
30.0 – 31.0	Clack, organic SAND.
31.0 – 32.0	SAND, coarse, well sorted.
32.0 – 34.0	Coarse SAND.
34.0 – 38.0	SAND, medium gray, with wood fragments.
38.0 – 39.0	SAND, medium, clean, subrounded, 30-percent white clack and gray shell fragments.
39.0 – 40.0	Shell fragments to 2 mm, clean, sandy, no clay.
40.0 – 42.0	Shells, pelecypods, whole to 14 mm, fragments to 2 cm, with fine, clean sand and gravel, no more wood.
42.0 – 44.0	Shells and sand, fine, grading to coarse.
44.0 – 46.0	No sample.
46.0 – 48.0	Slick green CLAY.
48.0 – 50.0	CLAY, dense, tight with shells and sand.
50.0 – 52.0	SAND, medium to fine.
52.0. – 54.0	SAND and shells, trace clay.
54.0 – 56.0	Clayey SAND, trace shells.
56.0 – 58.0	CLAY.
58.0 – 59.5	CLAY.
59.5 – 60.0	SILT.
60.0 – 62.0	Green CLAY, silty with coarse shells, gastropods and pelecypods, 1- to 3-mm phosphate pebbles.
62.0 – 64.0	Green silty CLAY, a few shells, finer than above.
64.0 – 64.8	Green clayey silt.
64.8 – 66.0	Gray, time-cemented SAND.
66.0 – 68.0	Limey SAND, hard with small shells, some coarse sand.
68.0 – 70.0	Quartz and phosphate PEBBLES, well rounded, 2–10 mm, with shell fragments, sandy silt and green clay in last 0.5 ft.
70.0 – 72.0	Green clayey SILT with small 1-to 3-mm quartz pebbles and shells.
72.0 – 73.8	Coarse limey SAND with a few pebbles and shell fragments, gray with greenish tint, hard.
73.8 – 76.0	Abundant shell fragments, 1–3 mm, with greenish-gray sand and minor clay.
76.0 – 78.0	Coarse sand and shell fragments, gray limey matrix, hard at top 0.8 ft of interval.
78.0 – 78.9	Gray, coarse, limey sand and shell fragments, hard; changed to roller bit.
78.9 – 82.0	Shell fragments, possible coquina layer.
82.0 – 84.0	Same as above, with few phosphate grains.
84.0 – 84.5	Same as above, very hard.
84.5 – 88.0	Same as above, softer.
88.0 – 90.0	Green CLAY, no sand.
90.0 – 92.0	Green sandy CLAY to green clay, no sand.
92.0 – 92.8	Greenish-gray orthoquartzite (chert cement).
92.8 – 93.8	Cemented SAND.
93.8 – 96.0	CLAY.
96.0 – 98.0	SAND, fine, well-sorted, trace clay (split spoon).
98.0 – 100.0	SAND, fine with clay, green-gray.
100.0 – 102.0	Sandy CLAY, fine sand.
102.0 – 104.0	Same as above.
104.0 – 106.0	CLAY with sand, green, tight.
106.0 – 108.0	CLAY with very fine sand, green.
108.0 – 110.0	Same as above.
110.0 – 112.0	CLAY with very fine sand.
112.0 – 113.8	Green silty CLAY, with sand stringers, hard at 113.8.
113.8 – 116.0	Green silty CLAY, with thin sand layers, quartz pebble 1–2 mm, small 1- to 1.5-mm plant fragment.
116.0 – 118.0	Same as above, with shells.
118.0 – 120.0	Same as above, with phosphate pebbles, 1–3 mm and 4- to 6-mm tan shale clast.
120.0 – 122.0	Green silty CLAY with abundant quartz and phosphate pebbles 1–4 mm, well-rounded, shell fragments.
122.0 – 124.0	No sample.
124.0 – 125.2	Fine SAND with hard, gray, clay balls.
125.2 – 128.0	No sample.
128.0 – 129.0	Very fine, gray, silty SAND.
129.0 – 132.0	No sample.
132.0 – 133.3	Shell fragments, soft limestone (loss of drilling fluid to formation).
133.3 – 158.0	Shell fragments, rounded quartz and phosphate grains to 2 mm.

Figure 9. Selected borehole geophysical logs collected in Strat-2 test hole, U.S. Marine Corps Air Station, Cherry Point, North Carolina.

Figure 10. Strat-2 monitoring-well construction report, U.S. Marine Corps Air Station, Cherry Point, North Carolina.

**Table 6.** Periodic water levels in Strat-2 monitoring well, U.S. Marine Corps Air Station, Cherry Point, North Carolina.
Date	Water level, in feet below land surface
09-21-2000	14.23
02-09-2001	14.68
05-03-2001	14.76
08-09-2001	11.51
03-29-2002	14.62
05-15-2002	15.45
08-16-2002	16.53

Figure 11. Hydrograph of ground-water levels in Strat-2 monitoring well, U.S. Marine Corps Air Station, Cherry Point, North Carolina, September 2000– August 2002.

Abstract || Introduction || Methods || Test Hole Descriptions || Seismic Data || Marine Seismic Data || Land Seismic Data || Summary || References || Appendix

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