Table T1. Core descriptions, Fort Mott borehole, Leg 174AX.
Run
Date
(Oct 2001)
Cored interval
(ft)
Run length
(ft)
Recovery (ft)
Recovery (%)
Primary lithology
Formation
1
3
 1–6 5.0 2.00 40 Silty sand Cape May
2
3
 6–9.5 3.5 4.20 120 Sandy clay Cape May
3
3
 9.5–15 5.5 1.60 29 Sandy clay Cape May
4
3
 15–18.5 3.5 1.60 46 Gravely sand Cape May
5
3
 18.5–20 1.5 1.10 73 Gravely sand Cape May
6
3
 20–25 5.0 1.60 32 Clay Cape May
7
3
 25–30 5.0 4.70 94 Sand on top; 27.7 ft contact; clay below Cape May/?upper Englishtown
8
3
 30–35 5.0 4.20 84 Clay ?upper Englishtown Fm
9
3
 35–40 5.0 3.70 74 Clay on top; 36.0 ft contact; sand below ?upper Englishtown/lower Englishtown
10
4
 40–45.5 5.0 2.80 56 Slurry in top 2.1 ft; clay with drilling mud lower Englishtown
11
4
 45.5–50 5.0 0.00 0 ? lower Englishtown
12
4
 50–55 5.0 1.40 28 Laminated silt lower Englishtown
13
4
 55–60 5.0 4.00 80 Laminated silt lower Englishtown
14
4
 60–63.6 3.6 3.60 100 Laminated silt Woodbury
15
5
 63.6–70 6.4 3.45 54 Silt and laminated silt Woodbury
16
5
 70–80 10.0 4.80 48 Silt and laminated silt Woodbury
17
5
 80–90 10.0 6.00 60 Silt and laminated silt Woodbury
18
5
 90–95 5.0 5.10 102 Laminated clay Woodbury
19
5
 95–100 5.0 5.20 104 Clay/silt with glauconite at base Woodbury
20
5
 100–110 10.0 9.90 99 Glauconitic sandy clay and silt Woodbury/Merchantville
21
5
 110–120 10.0 9.50 95 Glauconitic clayey sand; 113.3 ft contact; silt below Merchantville/Cheesequake
22
5
 120–130 10.0 4.80 48 Sandy silt with chert nodule at bottom Cheesequake
23
5
 130–135 5.0 3.30 66 Sand Magothy
24
5
 135–140 5.0 3.40 68 Sand Magothy
25
6
 140–145 5.0 3.30 66 Sand with interlaminated silty clay; 141.1 ft contact; sand below Magothy
26
6
 145–150 5.0 4.00 80 Interbedded clay and fine sand with sphaerosiderite nodules Potomac
27
6
 150–160 10.0 9.30 93 Clay with sphaerosiderite; sand to silty sand; silt Potomac
28
6
 160–170 10.0 5.80 58 Silt; very fine silty sand; silty clay Potomac
29
6
 170–180 10.0 6.60 66 Clay, silty with clayey silt laminae Potomac
30
6
 180–190 10.0 8.40 84 Silty clay, finely banded; sphaerosiderite Potomac
31
6
 190–200 10.0 8.50 85 Silty clay; mottled/laminated Potomac
32
7
 200–210 10.0 9.00 90 Clay, silty, very fine sand; mottled/laminated Potomac
33
7
 210–220 10.0 9.70 97 Clay, silty, mottled/laminated; some sphaerosiderite Potomac
34
7
 220–230 10.0 7.30 73 Clay, mottled/laminated; root zones Potomac
35
7
 230–240 10.0 9.30 93 Silt, mottled, common sphaerosiderite Potomac
36
7
 240–245 5.0 5.00 100 Clay; 241 ft faint contact; slightly clayey silt below Potomac
37
8
 245–250 5.0 5.20 104 Mottled clay Potomac
38
8
 250–260 10.0 10.30 103 Mottled clay and silty clay; sand Potomac
39
8
 260–270 10.0 9.65 97 Mottled clay Potomac
40
8
 270–280 10.0 4.80 48 Mottled clay Potomac
41
8
 280–290 10.0 3.10 31 Mottled clay Potomac
42
9
 290–290.4 0.4 0.40 100 Micaceous silt Potomac
43
9
 290.4–300 9.6 8.50 89 Sand, some gravel Potomac
44
9
 300–303.5 3.5 3.20 91 Sand and gravel Potomac
45
9
 303.5–310 6.5 6.00 92 Coarse sand Potomac
46
9
 310–315 5.0 1.35 27 Coarse sand and mottled clay Potomac
47
10
 315–320 5.0 5.25 105 Mottled clay Potomac
48
10
 320–330 10.0 8.35 84 Medium to fine sand Potomac
49
10
 330–335 5.0 3.75 75 Medium to fine sand Potomac
50
10
 335–340 5.0 3.15 63 Medium to fine sand Potomac
51
10
 340–350 10.0 7.10 71 Interbedded clay and fine sand Potomac
52
10
 350–360 10.0 8.65 87 Interbedded clay and fine sand Potomac
53
10
 360–365 5.0 4.25 85 Interbedded clay and fine sand Potomac
54
11
 365–370 5.0 5.00 100 Mottled clay Potomac
55
11
 370–380 10.0 10.00 100 Mottled clay Potomac
56
11
 380–390 10.0 10.00 100 Mottled clay Potomac
57
11
 390–400 10.0 10.00 100 Mottled clay Potomac
58
11
 400–410 10.0 10.00 100 Mottled clay Potomac
59
12
 410–420 10.0 10.00 100 Mottled clay and silty clay Potomac
60
12
 420–430 10.0 6.30 63 Silty sand and clayey sand Potomac
61
12
 430–440 10.0 7.90 79 Silty sand and clayey sand Potomac
62
12
 440–450 10.0 9.40 94 Silty sand and clayey sand Potomac
63
12
 450–460 10.0 10.10 101 Slightly silty clay Potomac
64
12
 460–470 10.0 10.20 102 Slightly silty clay Potomac
65
12
 470–475 5.0 5.30 106 Slightly silty clay; sandstone interbed Potomac








66
13
 475–480 5.0 5.40 108 Silty clay, mottled/laminated Potomac
67
13
 480–490 10.0 8.65 87 Silty clay with interlaminated very fine to fine sand Potomac
68
13
 490–500 10.0 9.30 93 Silty clay with interlaminated very fine to fine sand Potomac
69
13
 500–510 10.0 8.55 86 Silty clay with interlaminated very fine to fine sand; 508.15 ft contact; silty clay below Potomac
70
13
 510–520 10.0 10.35 104 Clayey silt; 517 ft contact; slightly silty clay Potomac
71
13
 520–530 10.0 9.90 99 Slightly clayey silt Potomac
72
15
 530–540 10.0 9.00 90 Mottled clay Potomac
73
15
 540–550 10.0 9.40 94 Mottled clay/gray silt Potomac
74
15
 550–560 10.0 9.30 93 Mottled clay/gray silt Potomac
75
15
 560–570 10.0 3.70 37 Sand and lignite Potomac
76
15
 570–580 10.0 8.00 80 Sand, lignite, clay Potomac
77
15
 580–590 10.0 2.30 23 Silty clay; lignitic very fine sand Potomac
78
16
 590–598 8.0 6.80 85 Lignitic medium sand; very coarse sand; very fine sand Potomac
79
16
 598–605 7.0 1.90 27 Lignitic sand and interbedded clay Potomac
80
16
 605–610 5.0 1.80 36 Gray silt Potomac
81
16
 610–620 10.0 8.40 84 Mottled clay with sand at bottom Potomac
82
16
 620–630 10.0 8.10 81 Clay over interbedded silt/sand Potomac
83
17
 630–640 10.0 8.20 82 Silty sand Potomac
84
17
 640–646.5 6.5 4.70 72 Silty sand Potomac
85
17
 646.5–651 4.5 6.00 133 Silty clay Potomac
86
17
 651–660 9.0 1.85 34 Silty sand, silty clay (2 runs, 86 and 86A) Potomac
86A
17
 651–661 9.0 1.20 34 Silty sand, silty clay (2 runs, 86 and 86A) Potomac
87
18
 660–665 5.0 4.55 91 Mottled clay Potomac
88
18
 665–675 10.0 9.70 97 Mottled clay Potomac
89
18
 675–680 5.0 4.70 94 Mottled clay Potomac
90
18
 680–690 10.0 10.00 100 Mottled clay Potomac
91
19
 690–694 4.0 2.15 54 Mottled clay Potomac
92
19
 694–700 6.0 6.10 102 Mottled clay Potomac
93
19
 700–710 10.0 10.25 103 Mottled clay over light gray clayey silt Potomac
94
20
 710–720 10.0 2.90 29 Mottled clayey silt Potomac
95
20
 720–725 5.0 2.80 56 Clayey silt Potomac
96
20
 725–730 5.0 5.50 110 Hard mottled silty sand Potomac
97
20
 730–740 10.0 9.20 92 Hard mottled silty sand and soft clay/sand Potomac
98
22
 740–748 8.0 3.90 49 Mottled silt Potomac
99
22
 748–753.5 5.5 4.80 87 Laminated clay and silt Potomac
100
22
 753.5–760 6.5 5.15 79 Silt, clay, sand Potomac
101
22
 760–765 5.0 5.00 100 Silty clay Potomac
102
22
 765–775 10.0 7.50 75 Mottled clay and silt Potomac
103
23
 775–780 5.0 0.00 0 ? Potomac
104
23
 780–785 5.0 5.10 102 Mottled clay Potomac
105
23
 785–795 10.0 7.70 77 Mottled clay Potomac
106
23
 795–805 10.0 4.50 45 Very fine sand and silt Potomac
107
23
 805–810 5.0 5.20 104 Lignitic silt and clay Potomac
108
23
 810–820 10.0 4.00 40 Silt over clayey sand Potomac
Fort Mott coring totals:
 820 638.85 77.9