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Table T1. Coring summary, transect HYD-02A. (See table notes.)

Core Date
(2010) 		Time
(UTC) 		Depth (mbsf) Length (m) Recovery
(%) 		Comments
Top Bottom Cored Recovered
325-M0040A-  
1R 5 Mar 2250 0 1.5 1.5 1.92 128.00 Drill string sank 1.4 m under its own weight with no drilling required.
2R 5 Mar 2330 1.5 3 1.5 0.17 11.33  
3R 6 Mar 0020 3 5 2 0.24 12.00  
4R 6 Mar 0230 5 6.5 1.5 0.27 18.00  
5R 6 Mar 0320 6.5 8 1.5 0.77 51.33  
6R 6 Mar 0410 8 9.5 1.5 1.12 74.67 Spring core lifter twisted out of shoe—metal in core.
7R 6 Mar 0450 9.5 11 1.5 0.52 34.67  
8R 6 Mar 0550 11 12.5 1.5 1.43 95.33  
9R 6 Mar 0625 12.5 14 1.5 0.48 32.00  
10R 6 Mar 0715 14 15.5 1.5 0.61 40.67  
11R 6 Mar 0755 15.5 18.5 3 1.6 53.33  
12R 6 Mar 0825 18.5 21.5 3 2.6 86.67  
325-M0041A-  
1R 6 Mar 1005 0 3 3 2.09 69.67  
2R 6 Mar 1040 3 5.4 2.4 0.86 35.83  
3R 6 Mar 1115 5.4 6.9 1.5 0.47 31.33  
4R 6 Mar 1150 6.9 8.4 1.5 0.29 19.33  
5R 6 Mar 1225 8.4 9.9 1.5 0.35 23.33  
6R 6 Mar 1310 9.9 11.4 1.5 0.44 29.33  
7R 6 Mar 1345 11.4 12.9 1.5 0.45 30.00  
8R 6 Mar 1425 12.9 14.6 1.7 0.66 38.82  
9R 6 Mar 1500 14.6 16.1 1.5 0 0.00 No recovery; assumed to be sand lost on retrieval.
10R 6 Mar 1530 16.1 17.6 1.5 0.96 64.00  
11R 6 Mar 1610 17.6 19.1 1.5 1.33 88.67  
12R 6 Mar 1650 19.1 22.1 3 2.16 72.00  
325-M0042A-  
1R 7 Mar 0330 0 2 2 0.4 20.00  
2R 7 Mar 0405 2 4 2 0.3 15.00  
3R 7 Mar 0500 4 5.5 1.5 0.32 21.33 Broken latch head dog—repaired after run.
4R 7 Mar 0640 5.5 7.5 2 1.1 55.00  
5R 7 Mar 0705 7.5 9.5 2 0.33 16.50 Change to HQ string after run.
6R 7 Mar 1230 9.5 10.7 1.2 0 0.00 API “casing” sank 1.5 m in soft sediments—caused HQ string to vibrate but no damage done.
7R 7 Mar 1330 10.7 12.2 1.5 0 0.00 Bit blocked—attempt to free by flushing. API “casing” sinks again—now resting on reentry cone on seabed template causing API string to swab the hole. Trip HQ and continue with API until a hard layer is encountered.
8W 7 Mar 1500 12.2 12.2 0 0.65 0.00 Sample recovered from tripped HQ BHA.
9R 7 Mar 1720 12.2 13.7 1.5 0.2 13.33  
10R 7 Mar 1800 13.7 15.2 1.5 0.2 13.33  
11R 7 Mar 1900 15.2 16.7 1.5 0.5 33.33  
12R 7 Mar 1930 16.7 17.5 0.8 0.2 25.00  
13R 7 Mar 2020 17.5 19 1.5 0.57 38.00  
14R 7 Mar 2100 19 20.5 1.5 0.25 16.67  
15R 7 Mar 2135 20.5 22 1.5 0.14 9.33  
16R 7 Mar 2205 22 23.5 1.5 0.2 13.33  
17R 7 Mar 2240 23.5 25 1.5 0.33 22.00  
18R 7 Mar 2320 25 26.5 1.5 0.43 28.67  
19R 8 Mar 0010 26.5 28 1.5 0.27 18.00  
20R 8 Mar 0050 28 29.5 1.5 0.43 28.67  
21R 8 Mar 0130 29.5 32.5 3 0.34 11.33  
22R 8 Mar 0200 32.5 34 1.5 0.39 26.00  
23R 8 Mar 0310 34 35.2 1.2 0.6 50.00  
24R 8 Mar 0355 35.2 36.7 1.5 0.46 30.67  
25R 8 Mar 0435 36.7 38.7 2 0.69 34.50  
26R 8 Mar 0500 38.7 40.2 1.5 0.13 8.67  
27R 8 Mar 0540 40.2 42.2 2 0.38 19.00  
28R 8 Mar 0615 42.2 44.4 2.2 0.56 25.45  
29R 8 Mar 0705 44.4 46.4 2 0.57 28.50 Broken latch head dog—repaired after run.
325-M0043A-  
1R 9 Mar 0840 0 2.2 2.2 0.17 7.73 Bottom 0.5 m of hole collapsed while running in a new pipe after the first coring run.
2R 9 Mar 0920 2.2 4.2 2 0.52 26.00 High torque during drilling.
3R 9 Mar 0955 4.2 5.7 1.5 0.31 20.67 High torque during drilling.
4R 9 Mar 1030 5.7 7.2 1.5 0 0.00 High torque during drilling.
5R 9 Mar 1105 7.2 8.7 1.5 0.12 8.00  
6R 9 Mar 1140 8.7 10.2 1.5 0.33 22.00  
7R 9 Mar 1230 10.2 11.7 1.5 0.12 8.00 Shoe jammed with broken coral pieces.
8R 9 Mar 1310 11.7 12.5 0.8 0.24 30.00  
9R 9 Mar 1420 12.5 14 1.5 0.57 38.00  
10R 9 Mar 1510 14 15.5 1.5 0.65 43.33  
11R 9 Mar 1550 15.5 17 1.5 0.5 33.33  
12R 9 Mar 1625 17 18.5 1.5 0.42 28.00  
13R 9 Mar 1700 18.5 20 1.5 0.12 8.00  
14R 9 Mar 1740 20 21.5 1.5 0.2 13.33  
15R 9 Mar 1820 21.5 23 1.5 0.17 11.33  
16R 9 Mar 1900 23 24.5 1.5 0.37 24.67  
17R 9 Mar 1940 24.5 26 1.5 0.2 13.33  
18R 9 Mar 2020 26 27.5 1.5 0.32 21.33  
19R 9 Mar 2100 27.5 29 1.5 0.05 3.33 Large coral piece blocking shoe.
20R 9 Mar 2140 29 30.5 1.5 0.14 9.33  
21R 9 Mar 2220 30.5 32 1.5 0.27 18.00  
22R 9 Mar 2310 32 33.5 1.5 0.15 10.00  
23R 9 Mar 2350 33.5 35 1.5 0.1 6.67  
325-M0044A-  
1R 10 Mar 0320 0 2.5 2.5 0.2 8.00 Fluorescent microspheres.
2R 10 Mar 0405 2.5 4 1.5 0.05 3.33 Switched to spring lifter as lithology very hard.
3R 10 Mar 0555 4 4.5 0.5 0 0.00 Decrease space between shoe and ALN bit to reduce mud flow and so limit unconsolidated material being flushed away.
4R 10 Mar 0700 4.5 5.5 1 0.2 20.00 Mud pressure remains low.
5R 10 Mar 0800 5.5 7 1.5 0.25 16.67 Significant vibration through drill string.
6R 10 Mar 0855 7 8 1 0.14 14.00 Shoe was loose in the inner barrel—reason unknown. Template lowered in water column in an attempt to dampen drill string vibrations.
7R 10 Mar 1000 8 9 1 0.13 13.00  
8R 10 Mar 1100 9 10 1 0.36 36.00  
9R 10 Mar 1615 10 11 1 0.34 34.00 ALN stuck in barrel. During recovery attempt the wireline parted—pipe tripped to recover barrel and overshot.
325-M0045A-  
1R 10 Mar 2130 0 2 2 0 0.00 First attempt at spudding in was aborted as string slipped 3 m rapidly—assumed to have “slid” down the side of a pinnacle/mound.
2R 10 Mar 2205 2 3.5 1.5 0 0.00  
3R 10 Mar 2225 3.5 5 1.5 0 0.00  
4R 10 Mar 2335 5 14.6 9.6 0 0.00 Continued problems with the drill string slipping. Solid drilling encountered between 4.3 and 5 mbsf, but then the string slipped to 14.6 m with no resistance—hole aborted
325-M0046A-  
1R 11 Mar 0130 –10.8 –4.53 6.27 0.13 2.07 Problems with pipe apparently “skipping” down a slope.
2R 11 Mar 0220 –4.53 –1.8 2.73 0.13 4.76 Problems with pipe apparently “skipping” down a slope.
3R 11 Mar 0320 –1.8 1.2 3 0.25 8.33 Problems with pipe apparently “skipping” down a slope.
4R 11 Mar 0420 1.2 4.2 3 0.26 8.67 Coring solid lithology.
5R 11 Mar 0520 4.2 5.2 1 0.43 43.00  
6R 11 Mar 0550 5.2 6.7 1.5 0.33 22.00  
7R 11 Mar 0630 6.7 8.2 1.5 0.32 21.33  
8R 11 Mar 0705 8.2 10.2 2 0 0.00  
9R 11 Mar 0740 10.2 12.4 2.2 0.25 11.36  
10R 11 Mar 0840 12.4 14.4 2 0.11 5.50 Hole collapsed 1 m while recovering barrel.
11R 11 Mar 0920 13.4 16.4 3 0.13 4.33 Top 1 m of core represents infill.
12R 11 Mar 1000 16.4 18.4 2 0.22 11.00  
13R 11 Mar 1035 18.4 20.4 2 0.22 11.00  
325-M0047A-  
1R 11 Mar 1430 0 3.2 3.2 0 0.00  
2R 11 Mar 1510 3.2 6.2 3 0.2 6.67 Contained definite seabed sample at top of core, suggesting first run seabed tag was actually drill string resting on a protrusion which broke off, causing the string to rapidly descend to 3.2 mbsf.
3R 11 Mar 1550 6.2 7.7 1.5 0.37 24.67  
4R 11 Mar 1630 7.7 9.2 1.5 0.24 16.00  
5R 11 Mar 1710 9.2 12.2 3 0.28 9.33  
6R 11 Mar 1800 12.2 15.2 3 0.24 8.00  
7R 11 Mar 1835 15.2 18.2 3 0.26 8.67  
8R 11 Mar 1930 18.2 21.2 3 0.42 14.00  
9R 11 Mar 2030 21.2 24.2 3 0.23 7.67 Decrease space between shoe and ALN bit to reduce mud flow and so limit unconsolidated material being flushed away.
10R 11 Mar 2115 24.2 27.2 3 0.33 11.00  
11R 11 Mar 2200 27.2 28.7 1.5 0.4 26.67  
12R 11 Mar 2240 28.7 30.2 1.5 0.29 19.33  
13R 11 Mar 2325 30.2 31.7 1.5 0.22 14.67  
14R 12 Mar 0015 31.7 33.2 1.5 0.31 20.67  
325-M0048A-  
1R 12 Mar 0405 0 3 3 0.12 4.00 Fluorescent microspheres.
2R 12 Mar 0445 3 4.5 1.5 0.32 21.33  
3R 12 Mar 0520 4.5 6 1.5 0.25 16.67  
4R 12 Mar 0600 6 7.1 1.1 0 0.00 Coring operations aborted because of bad weather—winds >35 kt and heave >2.5 m.

Notes: UTC = Universal Time Coordinated, API = American Petroleum Institute, BHA = bottom-hole assembly, ALN = alien corer (standard rotary corer). Negative depth values indicate depth corrections made during the OSP, to account for the drill string not penetrating the seabed on Runs IR–3R, thereby indicating progression through the water column and along the side of a topographic high.

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